My best friend and I both like this boy that we are really good friends with. The thing is he likes me, and I know that because he told me, and he has a girlfriend. I really like him but my friend does too and I know it's wrong to be with someone who a) has a girlfriend and b) your best friend likes. But sometimes we'll flirt and then we hug like we are dating. I tried to stop but I just don't know how. Help?