I don't want to ruin our friendship. What should I do?

All is fair in love and war . You didn't know about your other friend liking your now boy friend . Don't take it so hard . She was slow to make her feelings known . The thing is if he had a interest in her he would be with her . Play it by ear . Still be her friend and see what will happen . It is not the end of the world . Besides your a good kid . You understand feelings . Good Luck . It will work it self out .