My boyfriend was showing me something when he received a message from a girl I don't know, the message came across as flirtacious to me and I wasn't sure if they were friends or if she was a random, but I trusted him to do the right thing whether I had taken it the wrong way or not. I knew he would become defensive about it if I had brought up my concern then, the concern was obvious to him and he assumed I was mad at him but I reassured him I wasn't mad at him and that it was something petty he shouldnt worry about and that I'll sort it out. He kept bringing it up since then and he's acted distant so I told him, his immediate reaction was to become defensive about her and that I was simply jealous and that he felt sorry for me that I didn't understand what it means to have a closeness with friends. I told him I trust him, I wasn't at all mad at him and that I was concerned that she was a random that was flirting with him and that I simply felt protective of him, hence why concern was seen on my face. We've had similar problems in the past and they've all ended in unnecessary fights like this. I'm upset by what he said about me not sharing a closeness with my friends, and that he metaphorically, closed the door on the situation without resolving it. I'm not sure what to do now