Search Results: forgive my boyfriend for cheating

I recently cheated on my boyfriend (I kissed another guy) and I told my bestfriend because I know she wouldn't tell anyone and she's the only friend I could tell who wouldn't judge me because she wouldn't have the guts to be angry at me. I regretted cheating on him immediately and I've almost told him a few times what I did but he's started to really try and work on our relationship and i'd feel guilty telling him about it. But my boyfriend found out that I cheated and it could of only happened from her telling him. She's just ruined my relationship and she wasn't even close with my boyfriend. She should've respected what I told her but she didn't. Should I be angry? Should I forgive her? I dont know what to do.

I'm bisexual and this year I've had a girlfriend and a boyfriend.
I was seeing the girl for several months. During that period our mutual 'friend' kept interfering and causing bother between us both. This caused us both to argue a lot, I had enough.
Whilst I was only seeing this girl I met a guy whilst out drinking with friends. We got on pretty well, we went on several dates.
I was still seeing the girl, eventually they both said 'you have to choose one of us'. I wanted the guy because I 100% felt nothing for the girl due to all the arguments and drama our shit friend caused us.
Because I found the guy and she knew I liked him she kept constantly asking me to be her girlfriend. I ignored her for over a month and then eventually she pressured me into a relationship. We lasted three days and then I dumped her, I couldn't be with someone I felt nothing for.
I told the guy exactly how I felt about him, we was going well.
When I wasn't around the guy he made a load of nasty lies about me, my best friend told me (she was in the room whilst he told a load of lies about me). I then dumped him and guess what? He went around telling everyone I cheated on him when I 100% didn't cheat on him.
I didn't properly speak to him after that for over 2+ months.
We spoke in June and I forgive him for being a compulsive liar. We was going to get back together until he kept lying about my best friends boyfriend. He kept saying my best friends boyfriend was saying a load of lies about me, I confronted him and he was so confused because he said nothing about me. That was my final straw with the douche and now I've 100% washed my hands with the compulsive stupid asshole.
Have you guys had any failed relationships in 2015?