Yeah, don't worry about not orgasming through intercourse or oral - lots of us don't. They say that statistically, the majority of women are only able to through clitoral stim. And I will often take that long to as well - with or without help - except when things are Very hot and heavy.
And before my current man, I had never had ANYONE be able to give me an O (and considering how many people that was, that's depressing)... but with him, I was so much more comfortable and able to trust him like no one else - that made a HUGE difference. Being able to tell him what I needed without fear, that was just the best thing ever. I can do and be things that I never thought I'd be able to do with him, because I completely am able to trust him and be myself.
Go you. Masturbate more + Worry less = more orgasms and happy pussycats.