<human>: Can you summarize the given text in a few sentences?

We have been dating for about a year. A few weekends ago he went down to another city with his friends and got blackout drunk and slept with another woman. He regrets it so much and is so sorry but I am still so hurt. 
Somedays I feel like we can work through it and other days I am so sad and cynical about it all. I still love him so much but sometimes I feel so sad about everything. 
I don't want to break up with him because I still love him so much and want to believe that it will never happen again but I feel so cynical.
<bot>: Boyfriend of a year cheated on me. I'm not sure if I can get over it and maintain the relationship but feel like I would never be happy again without him in my life.