No sex drive when alone?

So, I used to masturbate a few times a week. Whenever I wasn't physically with past partners, I'd have to watch porn in order to get off. With my boyfriend now, I literally have no sex drive unless I'm with him. The other day we were talking on the phone and things got sexual and that was the first time in a while that I got turned on while I was away from him. When I'm with him, we have sex all the time. Is it normal that I basically have no sex drive if he's not around?