I need hope after the false "love" of COCSA

From the time I was around nine years old up until I was seventeen, my twin sister coerced me into having oral and penetrative sex multiple times. This continued over many, many years. It started as a game--we played "characters", students at a school that had crushes on each other in the midst of a universe we created playing pretend. The realization that what we were doing was wrong--that she was my sister and that we were really doing this--didn't kick in until I was around fifteen years old. I should've stopped her then, I know that now. The guilt was enough to crush me. I tried to call her off. It worked for several weeks. But we'd been close for so long, and she was my only source of comfort. Without what I thought was an expression of her love, I grew depressed and upset. And when I saw a poem she wrote, describing in detail the love she felt for me in the slant of the "characters" we always played, I thought it was a sign that I had been wrong. I came back to her and the abuse continued from then on. I started to feel guilty again and began trying to find a compromise--ridding myself of the urge to listen to her before the manipulation started, before she came in. I dreaded her nightly visits that had become our routine. As we went on with life, her feelings towards me started to bleed into real life, outside of the fantasy world of our "characters". She'd act weird about me crushing on people at school, dating people at school or online. When I found another poem of hers lamenting about my online boyfriend that she'd discovered reading my diary, not in the voice of the "characters" but in her own voice, I knew it had to end. During an argument we had later when I was seventeen, I asked her how she thought /I/ felt after going back on my promise to stop what we were doing. She smiled in my face and told me, "I think you like it. You're a masochist." The following weekend my mother left to vacation with my grandmother and my sister was moved to my room. I was terrified that it would happen again. One night when she tried I called her out and told her to stop. I thought it wouldn't work...but it did. My relationship with my sister has never been the same. We lack the closeness we once had. As a now adult going into my sophomore year of college, I'm starting to notice depressive behaviors again at my lack in love. Maybe everyone has someone and my someone was her, I keep thinking, over and over. I need proof that I'm not alone, that someone else out there won't hate me for what happened. I need to know there's someone out there who loves me, who fate has picked for me, that isn't her. I'm so, so glad to have a safe space to express my truth.