Torn between the two. HELP!

I really need help. I was with this man for 3 years, we had planned a future together, planned on having children and getting married. We were in it until the end and our love is so strong for one another it's indescribable. Prior to me moving closer to him, I started a new job and met a new guy. 😔 he was a friend of this girl I met and all of us became such wonderful friends. Well the guy I met and I started getting closer and closer. And I didn't tell my man about this new friend. And he found out by going thru my phone. Which caused EXTREME problems in our relationship for MONTHS. We broke up countless times and always found our way back even thru it all. And thru all those breakups, my friend was there. Me and my man had said many hurtful things to each other. And the last time we broke up, I just knew I was done. And guess what happened? Me and my FRIEND ended up together. And when I tell you it's been wonderful, it really has been. We've been together for two months. I never imagined starting over with anyone else bcus I didn't want to. But guess who's BACK in my life? My EX. I told you our love was indescribable. We can't stay away. And I didn't tell my current boyfriend that my ex boyfriend is back in my life. So now, I'm sleeping with them both. It sound horrible I know.. But they both hate each other and I don't wanna hurt neither one. But if I've learned anything, it's if you constantly do the same thing, you'll eventually get caught. And I know I need to make a decision. But I want it to be the right one! And I need your opinions! Do I choose history, or a new beginning?