He cheated on me. With his roommate. He said he got blackout drunk after we fought one night and went to bed and she came in to comfort him and they had sex.

I am so hurt, and so mad. I thought he was the best thing to ever happen to me.. I don't know what to do..

He proposed to me yesterday and I said yes.. I was so happy... but now I don't know what to do..

Part of me screams LEAVE

But part of me knows I love him with everything in me and I don't know if I should give him a second chance...

Please please help me... can relationships get past cheating... I feel so heartbroken. .