>>33197618
Most girls have trouble coming by themselves during sex, and need hand stimulation too.
Consider that normal sex happens at the speed he can move his hips, not at the speed of your hands.

Normal masturbation is fine as long as you don't have to do it too fast and too strong.
Clit vibrators and g-spot vibrators do overload and desensitize you over time as you fear. Better avoid those if you want to cum naturally.

There is no need to stop now if you don't have a bf or want to pick up guys now.