Frustrated. No orgasms?...

I'm literally starting to think it is impossible for me to orgasm. I am sexually active and have never had one... Not with oral, not with penetration, not even when I try to get off myself.... Literally nothing works. Sometimes I feel like I'm getting close, but then nothing. And maybe I'm not even actually close. I have no idea since I've never had one, but I mean I get tingly and almost "squirmy" like I need to move all over the place because it's getting to be too much to handle, but I never make it all the way... It's so frustrating. And it makes me feel like I'm not good enough for my partner, because me not getting off kinda puts a damper on things.