My love relationship with my Bestfriend

So I'm a freshman and my Bestfriend is a sophmore and he's so ugh so when my girl Bestfriend and him broke up cause she said he was Inlove with me (at that time we didn't have a thing but a good healthy relationship ) we didn't believe it. So one night we were on the phone and I told him I'm craving sex and he was like oh . The next day we were walking at school and he pushed me and had sex with me ( we have only done it twice ) But now that he's shown his emotion and Iv shown mine it's awkward and he said " I'm talking to another girl " And I get it but I don't think it's true to be honest .