Is it normal that i don't like sex?
I'm a 20 year old female that has been sexually active since I was 16. I've had sex with 5 different people, (two males, three female). I'm currently in a relationship with my girlfriend of nearly two years. I am sexually attracted to her and would consider myself a lesbian. However we have sex a couple a times a week, and unless I am touching myself, I will not orgasm. No other person has been able to make me orgasm and therefore, I do not enjoy sex as much as my partner.
To clarify :
I know I can orgasm because I regularly masturbate
I do not enjoy any type of penetration
I'm not honest with my girlfriend and have faked 75% of the time (she doesn't know any of this)