it's just the porn bro, plain and simple. you will definitely stop having this problem after a long enough abstinence from porn and masturbation. make it so that the only time you orgasm is with real sex and put a hard stop on porn and masturbation and after doing that for a while, your problem will go away this is because you will have rewired your brain and arousal systems to respond to actual sex and not artificial pleasure and masturbation

Finishing is the product of arousal, and since your most heightened state of arousal is to porn, it’s won’t be the same when with a real person

That’s the thing is that I have no problem getting it up around her or having sex with her it’s just the finishing part that I can’t do I’m hoping quiting will fix this

The longer you go without watch long porn and masterbating, the more you’ll be attracted to your partner, initiating stuff, or just self confidence in yourself.

I used to have that same issue in high school. I would have to take a break from watching porn. Porn desensitizes you to what is real (your girlfriend) because your brain is train to get off to what’s not real (porn).