If it isn't clear, he is probably just a friend, or the relationship is probably just casual.
But you won't know until you talk about it.
just tell him that you have a boyfriend or you could discuss it with your boyfriend and tell him to tell his friend...
simple, just say, 'Hey guys, i need to tll you something, i have a boyfriend!' If not just tell your closest friend!
just tell him
Tell him that the other guy is just a friend, and then, prove it to him, somehow...
You should not hide anything from your boyfriend. Foundation of a relationship is based on trust. You should tell him if you like his best friend .You would have to be honest to your boyfriend and tell him you like his best friend and then you will have to break up. It will hurt your boyfriend, but it would hurt him more if you hid the fact from him. If you think you can still stay with your boyfriend and 'just go out' with his best friend it is doubtful your boyfriend will accept this and quite possibly will break up with you.
just tell ur boyfriend that he is just a friend and that u don't have any feelings for him
Its not a big deal just keep it to yourself and you don't have to tell your BFF , but tell her boyfriend to layoff hes in a relationship
i think that you should tell your best friend that if she goes out with him that you will not be her friend
tell your friend the truth, or if you like your friend more than your boyfriend...dump your boyfriend!
If your a girl, just kiss her on her cheek as a friend, but if your a guy just do it and ask her not to tell
just be gentle and try and put it in a nice way
you tell your boyfriend that you don't feel that you are meant to be together that you feel that you and him will still be friends but that the relationship was not what you wanted.