HELP!! Cant cum

Skye

I've been having sex with my partner for 7 months now. We both lost our virginity to each other and have had lots of fun exploring sex etc.

The issue is I can never finish (Cum) I either get too sensitive to the point where it hurts or the feeling just goes.

I've tried masterbating by myself with my fingers, a vibrator, grinding on things but nothing is working. Ill get horny normally and wet but after I start there's a build up then just nothing.

Having sex with my partner is great and he's great with forplay and pleasing me but he's now doubting himself because he can't get me to finish.

PLEASE HELP!! Any tips or suggestions are welcome!!