Try to replicate whatever you do while masturbating in the bedroom. Or maybe masturbate in front of your boyfriend to show him what you like.
It’s very common for women to not be able to orgasm during sex. A lot of women require manual stimulation. There is nothing wrong with that! Or maybe you just need to experiment a little more. But there is absolutely nothing wrong with you.
If you need clitoral stimulation in order to orgasm, then do that. If you hit the G-spot while masturbating, then aim for positions that hit it. Or have him finger you. Just keep trying different things, it might take a little bit of experimentation to get it down.
Good luck! :)