Can't get the big O

Okay so, I rarely masturbate anymore because of this. I almost feel like I let my boyfriend down in all honesty, due to the fact that I can not orgi. Not for the life of me. He ask me almost every time if I got to finish and I always say no because I can't figure out, and I suppose he can't either, why I can orgasm. I'm not asking on solutions of how to squirt or anything, just on how to focus and concentrate on the task at hand enough to enjoy it a little more. I mean, we switched up our positions and we've tried different heights, furniture, and settings. Even the shower didn't help!!! I'm so scared of being a woman that can't finish and it almost makes me feel like feminine for not being able to. I feel like I have had a super power away from me. If you can find or if you know a solution that helps, where I don't have to fake it or say no anymore, PLEASE lmk. Thank you!