So.... how do I tell him?

[Xiao in florida]

where should I start? ok, so as most of you might know, I'm in a commited relationship with the love of my life. However, I think i might still have feelings for a past love interest. We met in college on really good terms but then.....deception became clear. He mentally abused me, and used me for my attention. He always made me feel bad for everything that I did and things that I didn't do...and somehow I loved him. I don't know why I did. He was bad for me. He was (and still is) way too immature, he slept around a lot, he never talked me about his feelings, he always got jealous when I start talking to other people (guys and girls), he was very physically ruff with me and used the excuse that since I'm a tomboy it shouldn't hurt, and so much more. I haven't talked to him ever since our last fight which was Feb 22nd. I started talking to a new person and ended up in a relationship with him and is still with him now. However, I still think about my past love interest from time to time....and I think I still have feelings for him. I don't know how to tell my boyfriend this but I need to get this off of my chest and clear the air. So my question is, how do I bring about such a thing to my boyfriend, and how do I forget about my past love interest?
Ironically, they know each other very well. My boyfriend's roommate is best friends with my past love interest so they hang out occasionally. However, my boyfriend hates him because of how I was treated.

[Xero]

I think you should wait a bit before you tell your boyfriend.

Try to solve this issue your self first. Think of all the mean and nasty things he did when you where with him every time you think about him. This will get you to look at the negative aspect of things rather that why you are crushing on him.

I think the only reason you are thinking about your ex is the "what if" factor. That is what is making you think about him and how things could have gone. Once you notice this is just crushing/lust for the other person you will notice that your current relationship is more important.

Just take some time and think about it before you tell your boyfriend. It might be better off if you can wait a bit of time to fix it your self.