Im sure you arent the only one out there and please do not feel strange about it at all. You are perfectly normal! I didnt for a long time either, I was tought it was morally wrong.

Its normal not to masturbate and actually many women don't, mostly due to the social stigma attached to your sex organs, and because it's harder for us to learn how on accident. Guys get it easy!

Many girls begin masturbation before sex, so that's why it matters to them. It was how they pleased themselves before they had sex, and it's how they please themselves when they are single.

my gf doesn't masturbate, and can't stand it when I touch her with my fingers. what's up with that ?

Some women just don't like it. In some cases it is actually a mental condition from past abuse or something else that actually needs to be dealt with; but for some women it's just not their thing. I don't know if you'd consider it rude to ask your girlfriend gently if she had sexual abuse as a child; because it could be a cause of this and it could be worked on. It's up to you.

If you and she are sexually active, is she enjoying sexual intercourse? I doesn't sound like it.