I know every story and relationship is different, but here's my story: when I was 21 I met this girl and fell in love with her. I was absolutely positive she was the one for me. Everything was perfect for me, and then one day she cheated on me and I felt destroyed. This of course ended our relationship, and I felt like shit for a long time, I was sure I would never find another girl like her, I would never love another girl like her, all the while keeping thinking about her and feeling miserable.

then one day some friends convinced me to go to a party with them, I hadn't been in the mood for any socialization stuff for months before and did not want to go and see lots of people but I ended up joining them, and would you believe it, on that night I met a girl who is now my wife. We've been married for 11 years now (wedding bday was actually yesterday) and I'm a happy man.

What's happening to you sucks but that's how life is unfortunately. Sometimes relationships last, and sometimes they don't. The sooner one gets used to that the better. It won't make breakups or sad moments less bad/sad but it helps getting over it.

It takes time to get up again after that kind of event, I know that. But you need to move on, and you will succeed. Life will get its shine back. Right now you feel hurt beyond repair, but you will repair yourself if you want. What you think and feel now is tainted by the emotions created by this situation. You're grieving and not thinking with full clarity. Believe me, true love is not a "she was the ONLY one and now she's gone" 1-time event. I loved that girl when I was 21, I love my wife today. Different stories, different love, but love nonetheless.

Don't give up and go ahead with your life without her. It'll be baby steps at first to accept your life without her being part of it, but you'll eventually get out of this. If I was able to, I don't see why you wouldn't too.