Sex addiction

I'm a 22 yr old female. Currently in a 2 yr relationship and before I met him I slept with 20 people numerous times. I never truly wanted to be in a relationship (of course now I do ).... I would sleep with multiple guys all the time, if one guy wasn't in the mood the next one would be. But my problem is my boyfriend is 6 years older than me and never wants to have sex, I don't wanna cheat on him but I'm afraid it will happen if he doesn't change. I would never force him for sex but I wouldn't wanna leave him just because of sex. Ladies what should I do?! I always try and "talk to him" about this issue and he swears we have sex a lot and this shouldn't be an issue