Need help coming

Hi.

It's very frustrating but I can't orgasm when I'm with someone else. I know how to reach orgasm on my own, I know what works, I've even tried existing in detail to every guy I've been with. I spent the weekend having crazy sex with an amazing guy and he was so vested in making me comfortable so I could come but I just couldn't. It's very frustrating. It's not even about comfort level. I don't know. Suggestions please!