Is it normal to masturbate this much?

First of all, I'm a girl.

I masturbate almost daily, some days I don't get out of bed until I've done it 2-4 times. If I'm not working, I'll do it a majority of the day. I used to live with a boyfriend, he'd be at work and I'd be doing it all day, then I wouldn't really feel the need to have sex with him. Other days, I would want to do it all day, and still want to have lots of sex. Is this normal? How often do girls usually do this?
Oh, and I get myself off, meaning, I think about myself. I get so wet just thinking about myself... If I'm sleeping with a guy, I think about myself a lot of the time. That's what gets me off.