I put it in this section because its concerning my friend and not my relationship.

Ok, so to start off, i've been dating AAA for about 2 months now and we're fine everythings great, but one of my closest female friends BBB always acts weird around me now and we always have little fights that usually blow over in a few days and everything is back to normal. Before i went out with AAA, BBB had got out of a long relationship with someone and had been single for about a month and told me that she had liked me for a few months but i just thought she was looking for a rebound guy and i was there for her so basically i didnt act apon it and asked AAA out a few days later.

Well BBB and I are still great friends now but whenever im out in a group thing wether it be at school or if we go to the movies whatever she (BBB) always gives me the cold shoulder or will get upset if i spend time with AAA and not with her. Last week about 5 people came over to my place to just watch movies hang out after exams too cool off whatever, and i spend most of that night with AAA but still tried to give her some attention but still she got upset as always. When one of BBB's other close friend (CCC) got close with (DDD), BBB also gave CCC a cold shoulder because of... what i assume... is that CCC didnt give BBB all the attention.

While she was going out with her ex she used to spend all her time with him instead of me and CCC but we allowed/accepted it because they were going out and they just wanted time to together but now she wont do the same for us. Its fustrating.

Basically what im asking is how can i convey to BBB that just because im going out with AAA doesnt mean that im not gonna talk to BBB anymore. And is what she doing common/allowed cause i feel like im getting into trouble for spending time with my GF