Fucked a girl, didn't perform to well..

Says it all in the title, pretty much me and this girl planned to fuck on Friday(her idea, not mine). She texts me today and says it's boring if it's not spontaneous, I say come over rn.

She comes over, start making out it's great, then we're fucking and in literally 2 seconds I feel like I'm gonna cum. Then I pull out, go down on her for a while and when I try to go back in, boner=gone.

So I fuck her half chub, finish and hate myself so hard afterwords. I went down in her for a while after but she just never finished.

Fuck my life, I walked her home and talked with her, acknowledged that it was bad, said its probably because nofap, before I would just rub one out an hour before and then last for days.

She went home and I know all of her friends are gonna know I'm terrible in bed.

I just feel like such a piece of fucking unworthy shit right now. What do I even do? How do I even fix this mess? How do you last longer in bed on nofap?