friends, relationships, and total stupdiity = emba

I felt for a while, that I might have messed up a friendship with this one guy... But I talked to him about it, and we're still friends. The only problem is that my actions seemed to have broken a friendship between myself and another girl who is good friends with him. When I see her, she ignores me. I'm not sure how to deal with this... I'd rather just accept the fact that I messed up, and move on, but I don't want to lose any friends over the situation...