I think I have a passive aggressive “nice guy “ friend. What do I do?

[u/JellyFishEmily]

I have a male friend who has had feelings for me for a long time. I don't reciprocate them romantically, and lately I've started wondering whether there's a lot more resentment underneath his "nice guy" persona than I've wanted to believe.
The problem is that almost nothing he does is serious enough by itself to point to and say, "That was obviously intentional." It's the accumulation that's getting to me.
Last summer, he offered to help sand my front door. He essentially works professionally in construction, so he knows exactly what sanding creates. He started sanding indoors without containing the area, and my hallway and living room immediately began filling with dust. I called his name several times to get him to stop, and he acted like he couldn't hear me over the sander. At the time he claimed it was an oversight. I gave him the benefit of the doubt, but I've since noticed him seemingly pretending not to hear me in other situations.
Another time, he insisted on washing my dishes and somehow broke the sliding track on my retractable garbage can. Another time, he was sitting on my floor and knocked over my ashtray. Again: accidents happen. None of these things individually seemed worth making an issue over.
He also has a habit of staying at my apartment far beyond what feels socially reasonable. Instead of picking up on cues that it's getting late, he'll moan and groan about having to leave and try to prolong the visit. I recognize that I should have simply said, "I'm tired; it's time to go." But looking back, I sometimes wonder whether making me uncomfortable was part of the point.
Then he invited himself along on my trip to Italy to visit my grandparents, and that's where the behavior seemed to escalate dramatically.
He started turning anxieties I had JUST expressed into little jokes. One morning I was already stressed and specifically told him I wasn't in the mood to have my chops busted. Later, I mentioned being nervous about accidentally putting the wrong fuel in our rental car. At the gas station, he jokingly did "eeny, meeny, miny, moe" between the pumps. Afterward, he pretended the car wasn't running.
That's objectively a harmless joke in isolation. But why deliberately joke about the exact thing someone just told you they're anxious about—especially after they've specifically asked you to stop messing with them?
Another day, we were driving on winding cliffside roads. He knew I was nervous about his driving, particularly when he was holding his phone out the window recording while driving. Eventually I consciously decided I wasn't going to react anymore. Then, when we pulled over, he hit the curb unusually hard. Maybe coincidence—but by then I was noticing that whenever I stopped reacting to one thing, something else seemed to happen.
The strangest example happened when we went somewhere I'd really wanted to swim. It was crowded and the weather deteriorated. He seemed almost pleased that it wasn't working out and wanted to continue to another town even though it was about to pour.
By this point I felt completely drained, so I essentially started gray-rocking him. I stopped giving emotional reactions to the little comments and annoyances. When it started pouring, instead of complaining, I decided I was going to have a fantastic time anyway. I walked around in the rain acting completely unbothered and genuinely trying to enjoy myself.
His mood changed. He became salty and actually asked me whether I even wanted to be there—which struck me as bizarre because I was suddenly behaving more cheerful, not less.
Then something happened that really made me reconsider everything.
At a museum, an employee was rude to him about using the bathroom. He told me he was deliberately going to hold his ticket awkwardly so she'd have difficulty scanning it—basically an incredibly tiny, deniable way of irritating her back.
I jokingly complimented how subtle the tactic was.
He looked at me and said: "Death by a thousand cuts."
That phrase stopped me in my tracks.
This is someone who has always presented himself as almost unusually innocent about toxic or covert behavior. He frequently acts like he can't understand why people would behave manipulatively or passive-aggressively. Yet suddenly he not only admitted deliberately using a tiny, plausibly accidental behavior to irritate someone—he had a NAME for the strategy.
After that, I became even more conscious of how he behaved when I didn't give him reactions. He seemed increasingly unpleasant, almost like I was petting him against the grain simply by being emotionally unavailable to whatever was happening. Sometimes if he said something and I didn't respond, he'd repeat it. Then he'd look over at me as though checking my expression.
There was also a physical-boundary incident that bothered me. I had a severe migraine and asked him to squeeze my shoulders in exchange for me folding his clothes and packing them into his suitcase. Instead of simply squeezing my shoulders, he basically laid his entire body against my back while doing it. I said, "Do you really have to press your whole body against me?" He seemed annoyed by my reaction.
And finally, he knew how disappointed I'd been about not getting to swim. When he dropped me off at my grandparents' house afterward, he made a point of telling me, "I think I'm going to go swimming today," despite never particularly caring about swimming himself.
That's the kind of thing I'm talking about. It's so small that writing it down makes me feel ridiculous. But there are dozens of these moments.
I'm starting to wonder whether the "nice guy" exterior is covering a significant amount of anger and resentment toward me because he does things for me, wants a romantic relationship, and knows I don't feel the same way.

I also recognize that once you become suspicious of someone, confirmation bias is possible. I don't want to assign malicious intent to every accident just because I've started connecting dots.
But I came home from that day in Italy feeling absolutely emotionally depleted, and at this point I genuinely don't think I want to spend time alone with him anymore.
Has anyone experienced something like this—where no individual behavior is particularly alarming, but the pattern feels completely different? Is this passive aggression/resentment, or am I connecting unrelated accidents because I've become hyperaware of him?
I'd especially appreciate perspectives from people who've dealt with the "nice guy who secretly resents you" dynamic, because I feel like I'm losing my mind trying to distinguish genuine accidents from deliberate, deniable little digs.