How do I cope seeing all my friends get married to their beautiful partners while mine just abandoned me?

Tldr the love of my life was sexually assaulted in a pub restroom and i didn't murder the bastard who did it because I didn't know how severe it was and also i was scared of someone much stronger

From childhood, I was a selfish and cowardly person who, because of these two qualities, coupled with inexperience, let down family and friends. I was beaten by my parents and offended at school, both by teachers and classmates, and I never knew how to answer. On the contrary, it began to seem to me that my bitter experience allows me to offend others, to take everything from life. I was very wrong, but definitely karma will bite me for this. My bad character and my grotesquely disgusting appearance (my left eye is lazy) led to the fact that I was fatally deprived of female attention and jealous of the men in my environment who drowned in it. Therefore, when on August 14, 2021, the most beautiful girl in my life, whom I had known for three years, invited me on a date herself, confessed her feelings to me and kissed me, I was the happiest person in the world. She was special. The most beautiful woman, dyed red hair and played rts videogames and watched anime, even let me touch her and seemed to want sex with me. However, in 48 hours everything turned upside down.

I witnessed the horrendous harassment of her on August 16th and did nothing. The rapist, our former friend, stood up and towered over her began to somehow strangely demand a kiss from her when we gathered for, as it seemed to me then, the most ordinary drinking party. I felt that she was not comfortable, but then I had no idea how bad everything was. I was too frightened by a physically stronger man to stand up for my beloved, especially since we had not officially dated yet. My God, I should have intervened already then!

The next morning, on August 17, I received a message that if I stood for her, she would have thought whether we should date or not, and since I did not see this, she does not see the point. I sobbed nine times after this message. I'm ready to cry over her right now too. What I didn't know at the time was that shortly after the kiss-demanding incident, he followed her to the restroom and started molesting her. Very bad. I even continued to communicate with this bastard for some time, not knowing the whole story. I learned about the whole picture only a week later, when we met with her in the same company on other friends birthday party (but without the rapist). It was a very difficult conversation and I made a mistake in it, my stupid head. I said complete nonsense and selfishly tried to cling to any little thing, somehow trying to rehabilitate myself, but this only hurt my beloved more. When I tried to promise that I would behave differently if I had known the full story or next time, she started making fun of me. Fucking hell. I cut off all contacts with the assaulter that same evening I had learned the full story, and he was still surprised, he said, “Why does it bother you? Fell in love with her? ”, To which I answered in the affirmative and sent the bastard to the Blocklist, after which, in the spring, I began to talk about his atrocities to the girls in our common institute. Although it hardly mattered, it was our last year at the university.

Somewhere in February, I blocked my beloved everywhere I could, because I realized that my feelings for her were not mutual and having her in my contact list, I only hurt myself. I hoped that I would forget it. Not at all. With a red-hot iron, her image is burned into my brain, heart, in my eyes. My mind is clouded, I feel disgust, shame, regret, depressive sadness, I want to cry forever. I thought that the gym and the study of foreign languages would somehow distract me from the manic desire to end a meaningless life in which I would never again touch the most beautiful and nicest woman on the planet. I began to hate my own sexuality and gladly would have self-castrated myself.

Even right now I pendulum from asexuality to wanting to fuck everyone, anyone at the first given chance. I wish this had never happened.

I want her back. More than anything in the world. I failed her. Now I have no one and nothing. My reputation is also ruined because she told everyone what happened. So now even if I wanted to find another girlfriend, I will never be able to because none would trust a coward such as myself.

It was my first time dealing with such situation and I just froze.

I wrote to my beloved and asked her forgiveness. She doesn't blame me, but when I said that I was ready to do everything for her safety for free, she said "no, but thanks for the offer." I wrote that I understand that she does not trust me, but suddenly yes, and that this is the first time in my life this has happened, to which she said that in any case I am glad that everything is fine with me and I wrote to her. I wrote her a paragraph that she gave me a lot of good emotions and this topic is difficult for me, and I want the best and make sure that everything is fine, she replied with one line "have a nice day" I wrote "you too" and deleted the chat.

I am very sad that she does not trust me and does not see me as a reliable person. She doesn't have to date me or anything, but her not trusting me hurts so much. Like a knife in the heart. I didn't do it on purpose, I panicked because it was the first time. It makes me cry and want to die so much.

Even if at some point I wanted to settle for someone else (I will never be nearly as happy as with her), I won't be able to because she told everyone what happened and news in Baku spread like forest fire.