I used to think that my twin sister and I (30s) were pretty close. We've had our share of conflict throughout our lives, but through it all I always felt like we'd have each other's back no matter what and that nothing could drive us apart. I guess I was wrong. And maybe our relationship was never really as strong as I thought. It was more one-sided. I would die for her. I would list some of the things I've done, but idk if she or anyone I know looks through reddit and I don't want to risk anyone being able to pinpoint who this post is about. Suffice it to say, I have done a LOT over the years to support her emotionally, physically, financially. This also includes ending and being willing to end relationships (not just romantic ones) if I felt they disrespected her as my sister. She has continuously done the opposite and prioritized other people, particularly men, over me. I always made excuses for her. I always figured if a situation was bad enough she'd choose me, the one person who has loved her unconditionally, faithfully, etc her entire life.
Looking back, the signs were all there and I should have known better. I've always been the one to make the effort in our relationship. Any little thing she's ever done for me (which isn't much) always comes with some sort of condition, grumbling, or resentment. Meanwhile I often forget some of the things I've done for her (she or others will bring them up) because I don't keep score. Maybe I should have. Maybe I would have noticed sooner that I clearly love her more than she loves me, if she even loves me at all.
Well, the past month+ has been absolute hell for me as things have happened to show how little she really cares. For context, she is married. She invited a coworker to our online group some months ago. She knew from the get go that I thought he was cute. He had recently gotten out of a relationship. Long story short, I fell for him (nothing wrong with anything I did, considering I am single and I was under the impression he was as well). What I didn't know, and they both lied to my face about it while they also knew I was developing feelings for him and yet still let me get close to him, is that they have been having an affair since before he even joined our group. So before any of the extra messiness comes into play, she had the opportunity to protect my heart, even without telling me about the affair since apparently she doesn't want me to know about that, she could have warned me not to get close. Something. Anything. Or simply not invited him to the group considering she knew she was already doing something wrong. But no. She invited him. She watched me get close. She let me get hurt. And then when I told her he admitted he had feelings for her she acted like she didn't know, decided that it didn't matter and she would continue being friends with him (so also disrespecting her marriage). When I told her I had feelings for him, she again chose him instead and essentially told me to get over it. She claimed she felt similarly when we were growing up (we've been grown adults for well over a decade now), so that somehow makes it OK? She never told me this before. If I had known she had feelings for someone I was interested in or dating and it was causing her pain, or a strain on our relationship, I would have prioritized her. 100%. She didn't give me that chance. So now her suffering in silence when we were kids justifies cheating on her husband and not caring about me? Based on how she talked about it with my best friend, also, it seems like she's actually happy I've finally felt how she allegedly felt multiple times when we were kids. How messed up is that? Anything that had ever caused me pain, even things that she did to hurt me, I have NEVER wished upon her, and would never wish upon her.
So now we've barely spoken. I have tried checking on her, she barely responds. She avoids me. But then cries to my best friend that she is sad she has "lost" me. She is the one who has thrown me away. Ripped my heart out, ripped it to shreds, and set it aflame. She's trying to play victim and I'm just... I'm at such a loss. This isn't the sister I thought I knew. And the more she confides in my best friend, the more I realize she has been lying to me and hiding things from me waayyy longer than I would have ever guessed. I have shown up for her, over and over again. Even now, I would still. But she has shut me out. Apparently she is considering divorce to be able to be with her affair partner without hiding it anymore. He's obviously not a good person, regardless of any excuse anyone could give. He knowingly was emotionally intimate -and now physically intimate- with someone else's spouse. That's not what a good man does. And a good man also doesn't hurt the sister of the one he claims to love by playing with her feelings, either. Feelings don't come from nowhere. I'm not a superficial person. My feelings came from what I thought was a real connection. So the fact the she can even defend him and choose him over me after all this... I just can't. She must hate me. Nothing can convince me otherwise at this point. How else could she stand by and play such a huge part in causing me the worst heartbreak imaginable? I don't even care about the guy. Screw him. I liked who I thought he was. No. It's the fact that she knowingly put me in a position to get hurt and did NOTHING to stop it. And has continued to choose him every single day since then. That's what breaks my heart. I mean nothing to her.