Relationship Arguments

So my boyfriend has major trust issues from seeing his mom and dads relationship (she cheated on him multiple times and while he was away for the military), and we often fight over small things that have to do with him not believing me. I can handle all of that but it's the way we argue that makes me want other people's opinions! When we argue he seems to have no reguard for my feelings or if I cry at all, like it doesn't phase him from calming down or taking a beat. He doesn't really yell but he's apathetic, we've been together for 3 months. Thoughts?