Ask him :/
You tell the truth and accept the consequences.
In most cases if a boyfriend was not cheating and was accused by his girlfriend then he would be angry and since your boyfriend is silent there is a high possibility he is cheating and cannot own up to it.
Tell him the truth, say you like girls.
No. Blackmail would be if you went to the boyfriend and threatened to tell on him unless he paid you something.
You should tell your friend that he is cheating its best that she knows.
Ask them!!! And if you are wondering they probably are.
Well he might make excuses to not hang out with you..
He's either cheating or watching strippers
You can just tell her if you don't want her to be anymore.
Lie and tell him you cheated on him... he'll tell you just to get even with you.
Just tell him everything.. and hopefully he will understand and appreciate that you told him.