What happens if you keep going with intercourse instead of pulling out? I mean, why do you feel the need to do that?
The reason I'm asking is I suspect that it has nothing to do with your masturbation habits- or if it does have something to do with masturbation, it's a mental thing that you're more comfortable having an orgasm from your hand than intercourse. The reason I think that is I've read numerous medical sources saying that masturbation does not lead to sex problems, ed, pe, or anorgasms.
So, since you're single now, I'd say go for it and continue masturbating. When you have a sexual partner, there are a few things you could try, you could try and just force yourself to keep thrusting when you feel like you're getting close instead of pulling out and using your hands. Or, maybe an intermediate step would be for her to use her hands and finish you off? Do you think that would work?
Or just embrace it and do it how it feels good- if you're paying attention to the needs of the girl then she won't mind.
Let me know what you think-
Danielle