Im falling for my boyfriends brother!?

i would say that you are emotionally cheating on him with the brother. i was in a similar situation with my ex long ago,and i can tell you that it just hurts the current relationship emotionally and physically do to you always wanting to be with the other man and thinking about him. you say you love and want to be with your bf forever but if you are having these feeling for another guy do you really love him as much as you say you do? you have to think about him and his feelings and how this would hurt him in the long run. think things through and really evaluate you heart.