How to tell your feller...

For some reason I cant have the big O during sex but then again I go down on him but he still hasn't on me and he won't play with my clit during...so how do I bring it up that I wanna use my vibrater during so I can enjoy sex too? I mean I do enjoy it to a degree I love the feeling of him inside me I just want the big O too and him not the only one having an orgasm...