Please help

I’ve been with my boyfriend for little less than half a year now. I love him very much but I feel like I was fooled into thinking he’s the sweetest person. He was showing me posted a question on Reddit yesterday. I decide to go look back at the thread to read it some more and I end up reading the questions he’s asked in the past just for fun. As I’m scrolling back to March of last year I noticed he was lusting over this girl trying to get a discount on her only fans. Commenting on 3 posts asking to split the price and and also commenting her username for someone posting her picture. He was single at the time so I was not too upset. I asked him his thoughts on only fans and he lied and said it would be weird if he had one. I sent him the screenshots of the Reddit post confronting him. I don’t know why you would have to lie about that. He could’ve simply said he had one and did use it. I don’t think someone would just create an account and not use it. To make matters worse the girl has 1000 followers on Instagram. She’s not popular so this means he must’ve really looked for her. He says he doesn’t remember. Which is that even believable? Again I’m not upset if he had one I’m upset he just didn’t admit it and just says he doesn’t remember. He paints this picture to me sometimes that he’s the sweetest and most trustworthy guy. I don’t know if I’m overreacting but this made me look at him different. Whenever I also mention having trust issues he yells at me and tells me he’s tired of proving himself to me. He yells at me real loudly in my face. He had apologized and said he will work on it. But everything just doesn’t sit right in me. I’ve never yelled at him. But he has done it 2 times. I told him if he ever raises his voice I am leaving him. He started researching how to control his anger which I won’t believe till he applies it. He goes I feel like I’m on thin ice. I said you are. I’m not putting up with that and I’m sure no other girl would. In the beginning he made it seem like he never got mad never raised his voice. It is true people’s true colors come out as time goes by and they get comfortable. So after the only fans thing it just made me question how do I trust someone like this? Am I over thinking everything and being dramatic?