Religions vary tremendously in their tolerance for masturbation. Everybody does it. There is no evidence that it causes any problems. Eighty percent of people admit to doing it and twenty percent lie about doing it. That can be hard to determine when you are young.
Love is about comfort, familiarity, closeness, trust and really caring that the other person grows.
Infatuation includes immediacy, insecurity, holding on, etc. I am deeply in love with my girlfriend but her sex drive is zero. I have tried everything I can think of. If your sex drive is high and hers is low, that will probably represent continual frustration. It would be good to know her age.