<human>: I (20F) have been with my bf (20M) for 3.5 years. I admit that I am insanely insecure and get jealous easily. I have been having trust issues in my relationship for a while now. I've found that my bf constantly "forgets" to tell me certain things when I ask a question. For example, when we tell each other what we've been up to, he'll say everything he did, but then forget to mention that he was chatting with a female friend. When I find out later on and ask him about it, he'll just say he "forgot" because it didn't matter to him. This has been his excuse for a lot of things. Then if I ask what they talked about, he'll just shrug and say he doesn't remember cause it was nothing special. 

I keep thinking he is lying to hide these things because he thinks it will upset me, and he doesn't want to deal with that. But really I just want him to be more honest with me, and I want him to tell me these things because when he's open about it, I feel more comfortable in the relationship. However, when it's things like these where I find out later on that he omitted/forgot to mention something, it really bothers me, and I feel like my trust has been shattered. 

I know he forgets certain things that aren't strictly related to girls. But, I feel like when it's something that you did, how do you not remember it? I don't leave out anything when I tell my bf these things. But I feel like it's just so convenient that he forgets these things related to girls, and his excuse is "it wasn't important, so why would I remember?" When I tried to talk to him about it, he would say something like: "Should I just make them important so I remember every time I talk to them?" I've told him that whenever he says he forgot, it feels like he's hiding things. But then he says he has nothing to hide.

Am I just overreacting and going crazy? I REALLY want to trust him, but he makes it hard. Are guys seriously that forgetful?

Can you succinctly summarize the text in 1-3 sentences?
<bot>: Bf always forgets to mention things, especially about girls. Says he doesn't remember because they're small and unimportant. Can't tell if he is lying to avoid upsetting me or genuinely forgetful.