what should do about this situation?

[hbn_235]

I have best-friend/bro i known for years and have done business with music and we were tight until one day when him, me and gf were over my other friend house....we are all cool and everybody knows who my gf is and so my gf figures that friends are her friends which is true but dis same day she took me to work and came back to my other friend's house my best-friend/bro, her and my other friend chilling listening to music until my gf decides to go get some cigs so my best-friend/bro decided to go with her also because he wanted some also so they drove and gotten cigs and she told him that she was hunger and so my best-friend says he'll cook her something and the plus the simple fact he was fucked up from drinking...so when they got to his house she assumes that he'll bring it out and everything but he told her to come in so she done just that. while the food was cooking he sat next to her all close and was trying pull slick stuff to her so she decides to leave and txt me and told me about the situation and after she told he told me about it what happen and apologize but if it was me doing that to his baby mama he'll go bananas, the nxt few days i Talk to him and he told me his side of the story which ain't sound right at all so then after we Talk he went back in the house where my gf sis was at and he hunch his shoulders all nonchalant like he ain't care...so what should i do cut him off or accept his apology?