This is long. I just kept typing and it came out like this...ha

I met him almost three years ago, and we went out 2 days after we met. Everything seemed fine and it was the first real time I felt that way about someone, and he told me the same.
But for some reason I began to feel weird about it about three months after, so I told him I wanted to break up, but still wanted to be friends. This completely broke his heart, and he was absolutely devastated for about a year and a half. In that year and a half, I dated someone else, and he continued to feel hurt and "emotionally damaged".
All throughout my new relationship, I still thought about him, and finally I called it quits and we tried to start the relationship over again. I don't know what accounted for my change in feelings, but our new relationship felt even more amazing than the last time. Then out of nowhere he started to act differently. He'd talk about all these girls and put me down and one day I called him to find out that he was with one of those girls, and he told me he didn't want me around, and at one point, to "get the fuck out of my car". So I told him it was over and that was it (obviously). He started dating a new girl and he seemed to be happy with that.
It took me three months of pretty much being heartbroken, but I started a new relationship with his best friend, and he made me truly happy, and I could forget about what had happened. My old boyfriend would constantly flirt with me and try to touch me when no one was looking, but everyone knew and decided to hate me for it.
About a week ago, my old boyfriend came over to tell me that his feelings never really dissapeared in the three years we've known eachother. He said he knew that wanted to get back together with me would kill his relationship with his best friend, and he was upset about that.
I told him I didn't know what to do, and honestly I didn't believe that his feelings would stick. He kept changing his mind over and over again like I thought. My boyfriend and I went on a break and in that break, my old boyfriend and I had sex 4 times and that just left me feeling like shit.
I know I still have feelings for my old boyfriend and I really care about my current boyfriend, but feelings will get in the way. My old boyfriend claims that he's 100% devoted to me now, if I'll have him, but I don't know...
To add to it, I've split up best friends since kindergarten and their band. Sometimes I think that maybe the feelings me and my ex have are just from the past and all the good times we had, but sometimes I realize that I'm probably in love with two people at the same time, but other times I'm thinking I just don't want to hurt my boyfriend any more.
I guess I'm just really confused.