This is going to be a common problem in your relationship with your friend. Having similar interests, and hanging out together, آپ are bound to meet and like the same guys sometimes. The two of آپ have to set ground rules: 1. Should not be invading each others territory. If one has already started dating / having a relationship with the guy - do not interfere. No matter how much آپ may think that آپ and he may make a better couple than your friend and him, آپ could risk loosing a friend. Besides, he may have his own scruples, and آپ could loose them both. 2. Discuss the situation with your friend. There is nothing worse than finding out later that your friend had feelings for your boyfriend. The feeling of betrayal could result in loosing a good friend. 3. Discuss with your friend a plan of action if in the event آپ were to both meet a guy آپ both liked at the same time. Try to stick to the plan - ie if آپ both agree to just let the guy decide, یا agree that neither of آپ two pursue the guy.
Anyway, without knowing مزید about the actual situation, that is the best answer I can come up with now.
