advice?

My boyfriend and I have been together for over a year and we live together have been for about 5 months or so. He masturbates every single night and I always catch him talking with his guys about how he would fuck (persons name here) and when I would confront him about if he wants to be with me he says yes that he's just saying that with his guys but he would never do it or cheat on me but I still feel hurt that he would even think about fucking other girls. Also we don't have sex in the beginning he could not keep his hands off me I lost my virginity to him and about a month after I moved in we stopped having sex when have sex very early like once every 2 months or so? And when I try to have sex he replied with "I've been working I'm too tired" but still sits at a computer playing games with his friends and talking about how he's always horny and wants to fuck and constantly looking a porn gifs. So I want advice on what to do? I always feel like I'm too fat and I disgusts him or the sex isn't good for him /: