Relationship advice

I know I may seem crazy and that's one reason I need some advice.

Been together 2+ years.

My issue; he has over 1900 Facebook friends, most of them women and from all over the states even a few out of country (Ireland, Philippines, England, etc.). It bothers me that he is Facebook friends with so many women he would have no way of knowing in person. He has one that is a cam girl or whatever (you pay for her pictures and videos).

I have a hard time trusting him because I found pics of his dick on his phone, him signed up for sites that people post naked pics and other inappropriate things, and him emailing a girl asking for more pictures/videos of herself after receiving nudes and a video of her masterbating. These took place within the first 5-6 months of dating. We were living together but I was working night shifts and the times were when I would not have been home. I've already confronted him about that but I dont trust him.

Idk what I should do. All advice is appreciated.