Who's your daddy?

 Me and my boyfriend have been together for six months and we constantly have sex with out any contraceptives and he never pulls out.   It's not like we were TTC we just didnt really mind. Recently though we broke up for about two weeks because we got in a big fight. While we were broken up I was so devastated that I got incredibly drunk and ended up sleeping with my best friend. And now I'm pregnant. My friend said he made sure he pulled out and it wasn't very likely it was his especially since I had already ovulated. I know for a fact that me and my boyfriend had sex when I was ovulating. I just feel incredibly guilty and horrible because I love my boyfriend with all my heart and I never meant for this to happen. Basically I just want to know what the possibility is that the baby is actually my boyfriends and not my best friends.... (God that sounds awful) thank you for any feedback.