So this is my case,
I'm sixteen years old.
For years I masturbated frequently, enough to where I, I guess you would say, trained myself to finish faster, because that's the best part you know.

Now it's coming back to haunt me.
The first girlfriend I was sexually active with was an embarassment, I would ejaculate in under 20 seconds [ONLY WITH SEX, Not handjobs/blowjobs].

I also have some anxiety issues, so that makes it even worse. And for some reason, I haven't read this anywhere else yet, but sexual sounds/moans from a girl will trigger something in me and like, jumpstart my ejaculation. For example, if I'm watching porn and the girl starts moaning, I'll finish soon after.

I dont think I have anything physically wrong with me, because now when I masturbate I can last for an hour if I try. But if I masturbate with a lotion, I can only last about 10 minutes max, so far. But hell, I'd be satisfied if I could last 10 minutes with a girl. I'd do anything to last 5.

It's an embarassment and it's also torture because I'm the type who likes/wants to be very sexual, and here I am finishing in 20 seconds with a girl.

Does anyone have any tips, tricks, or cures? I've read about many, and none have helped significantly.