How can i forget about my ex?

4 days ago i broke up with my boyfriend because i found out from his best friend that he likes my best friend. I was with my boyfriend for 3 months and i was honest to him, i told him i liked this other guy, he didn't like it but at least i didn't lie to him. When i asked him if he liked my best friend he was honest and he told me he hated himself for liking her, but it was too late. He says he still loves me but he just wants to be friends for now. I was not okay with that because if someone loves you a lot, that person wouldn't ask you to be just friends. The same thing happened before, he use to like my friend, they went out, they end up breaking up and he started dating me again. The 3 months we were dating, it was getting pretty serious; he met my family, i met his. And the worst part is that i lost my virginity to him :/ and now i think i might be pregnant.

I can not stop thinking about him because everything reminds me of him. The good thing is that my best friend does not like him and she has a boyfriend. She's been supporting me but now i feel different with her. It's not the same. This is hard for me because it makes me really insecure because i know my best friend is really pretty and on top of that I've been always been insecure.

I don't know what to do anymore. I've been trying to go out but my mom won't let me hang out with my friends that much. Also, i've been trying to talk to other guys but all they want is just talk about sex and i don't want that.

I need help :'(