I need conformation.

My boyfriend and I have been together just over 4 months. And before we got together I knew he had a roomate. And she was a she. Maybe I'm just getting irritated about her. But he takes hours to answer. But he does play video games. And he tells me they fight a lot and stuff. But he lets her sleep in the same bed because it's a one bedroom apt. But they have a pull out bed couch. HELP. IDK WHAT TO THINK. OR DO.