"I love you"
Tell your boyfriend that they love you then hopefully they will step down a step on the love scale.
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.
Well think of it this way: Who is more important to you? Your best friend or your boyfriend's friends?
Just tell him. The truth is always the best route to take.
merry the bagle
Well, you tell him that he's is the best.
just tell him
Honesty is the best policy, tell him what your concerns are.
You don't tell him. Just go with the flow, and let you best friend tell him.
Then what's your problem?
well tell you're best friend! and break up with your boyfriend...
Tell him you are not interested in him, and if you were, you would not see him, out of love and loyalty for your best friend.