I slept with my best friend's boyfriend, how do I fix this?

I got drunk last weekend and slept with my best friend’s boyfriend. We were all drunk at her house watching TV. She passed out and her boyfriend carried her in the bedroom and put her to bed. Then he came and sat on the couch with me.

I was feeling kind of vulnerable. I haven’t really dated in a while and went through a bad breakup a year ago. I put my head on his shoulder and hugged him but it was only in a brother-sister way. We’ve been cool since the whole 5 months they’ve been together.

I am not sure if he started it or I started it but we started kissing. Then he took my hand and we tiptoed down to the laundry room like little kids and basically went for it. Clothes off, different positions, the whole nine yards. When it was over, I gave him my number and just broke out. He called me and we made a pact that this would be our little secret. The next day he came to my house and we did it again.

She knows I always crash at her house when we’re hanging late so the next day she was like, why did you leave? I just made up some excuse. Now her man keeps texting me asking when we’re going to hook up again. He said if I don’t do it, he’s going to tell her what happened and say I came on to him.

He’s not even my type and now I feel like she shouldn’t have really left us alone together. He’s always looking at other girls and making off the wall remarks anyway.

She’s been like a sister to me since forever and I love her. She always has my back, she got me a job, and lends me money when I need help. I don’t want to lose our beautiful friendship. What should I do?
I slept with my best friend's boyfriend, how do I fix this?
Post Opinion