My boyfriend is a complete sex addict

My boyfriend and I had only been together one month and we slept together, it was my first time and now I think back although I have no regrets as such it was far too early. But at the time I felt ready, I would have done it after 3 weeks, but he said no I wasn't ready. Ever since I gave it him the first time, he wanted it more a less everyday, and we were having it about 4/5 times a week, then one week we had it everyday, I was getting a bit bored, buthe only lasted 5/10 minutes so it wasn't too bad, I just tried to enjoy myself, but then he started to express sexual fantasies and desires, and basically reinact porn, I wasn't impressed and he knew I felt uncomfortable but he said he trusted me and felt he could ask me to do anything. Now I finished him I feel lost and even I want sex, but just not the dirty sex he wanted. He keeps begging for me back, but I can't help but think he won't really change. I don't like the fact he watches porn, and obbesses about sex 24/7. Even though my mates said he's weird with what he was asking, they can't really talk as they do that with their boyfriends, its just the fact they have been together longer than we have. Maybe he did just want sex from me, but he wouldn't be chasing and back for me back the way he is doing, I keep thinking maybe I'm being harsh, maybe different sex drives isn't the end of the world, but I can't help but think if I don't give him dirty sex he may go elsewhere?