Welcome to Gaia! ::

I am the same way, although I don't have a significant other. If I figure it out, I'll let you know.

Some women have this problem, so know that you're not alone. That being said, doesn't really help the situation. I read somewhere that for some women, the majority of the nerves found in the clitoris are deeper within the skin so a vibrator can stimulate them where a hand cannot.

My question is this: what does your vibrator look like? If it is a non-threatening shape to your partner (aka not a exact replica of a p***s) or a funky colour or something, perhaps he can use it on you during sexual intercourse. He shouldn't feel like he's competing with it, and I'm sure once he sees you orgasm, he'll be more than willing to make it a part of your routine.