Feeling anxious in my relationship

My bf and I were arguing about a girl who followed him and then blocked me. My bf then got pretty angry. My bf says he wants to hide things from me when we fight but then says he didn’t mean it and it makes me feel really anxious and hurt and as if I’m going to have to give up when he says that because I don’t like the way it makes me feel. I feel like if he logs out he’s hiding something which makes me feel like he doesn’t care about me. Like if he has nothing to hide why wouldn’t he be leaving everything alone. I get angry at why I am bothered wether or not he logs out. Like why does it even bother me, why can’t I just not care, but then I don’t want to not care cause then I don’t let myself be vulnerable and I put a wall up and it’s no fun. Then I keep thinking about it over and over as if I’m trying to mentally prepare myself for the worst or something idk it feels like I’m grieving like crying whenever I think about it and feel uncomfortable inside. Is this something that I need to see a therapist for? Like I get really anxious if he logs out of his accounts because I would feel like he’s hiding something. Is this normal or just me.