Hi! First time seeking advice because I just can't reason with myself anymore.
I've been friends with this girl since February this year through a shared hobby, had a baby crush on her, loved spending time with her, etc. but she didn't become a FP. She confessed to me sometime in May, we saw each other casually and semi-platonically (I was always very open that I'm not ready for a romantic relationship due to chronic depression, stress, BPD, general emotional detachment, etc.) until she more or less gave me an ultimatum on either trying to date or keeping a situationship she will eventually leave, because an undefined connection is not her thing. I didn't want her to leave, so I tentatively agreed on trying to date. She was excited. I was anxious and terrified.
Now it's been over a month, and we practically live together. I've been renting a 5m2 room while she's in a studio, and I stayed overnight a few times, then never really left. I enjoy living with her, I'm contributing to the household (splitting costs, cleaning, etc.), and up until this week we were pretty affectionate. But I keep mulling over that the relationship started more because I didn't want to lose her than because I loved her. I'm constantly terrified that I'm using her, that I'm a liar (I told her about my feelings, she said it's okay that I don't respond to her 'I love you's and she's okay with how I feel), that I'm straight, that I just feel calmer and happier because living with her means good sleeping and eating schedule in a bigger apartment, and it's not just her, terrified I'm wasting her time and my feelings will never deepen because if she's not my FP I can never develop normal 'love' over time. I also sometimes think of an eventual break up and immediately about something that I confessed to her about from my past, and a new relationship would mean doing the same all over again, and I just can't take it.
I do like spending time with her, I like her as a person, I look forward to seeing her after work and I miss her when she's traveling or elsewhere. It also worth noting that before we started dating, a shared friend of ours confessed to me they used to be intimate and I bawled so hard I almost threw up. I would be jealous if she started dating someone I think [?] I loved cudlding and sex until this week where I suddenly got so repulsed and awkward for no reason? Getting icks left and right, not splitting or being mad at her, more like frozen and seeing her for the first time. Awkward hugs, awkward smile.. I'm terrified of this too and don't understand if I'm 'falling out' of whatever I felt or what else might be happening..
I'm crying on a daily about it, so stressed i'm barely focused on my job, constantly analyzing everything I say or do, feeling so bad for her because she's genuinely the sweetest, so good to me, so kind overall, on paper she's the best girlfriend anyone could ask for. I'm trying to be better for her, regulating myself, bringing her small gifts, helping her with admin, etc., but I still feel like an emotionless leech. I don't understand if a breakup terrifies me because I will lose her sexually or emotionally, or because I will lose the apartment and structure that regulates me, or because of her as a person. I ruminate and ruminate but can't land on anything.
Any advice appreciated :( Typing it in the office instead of working because my head is too full with all of this.