What should I do?? ED 21M

In the last year i’ve had diminishing sexual function. -Went long distance (LD) w my GF for a few months -masturbated a lot / didn’t handle LD well -flew to see her -had sex multiple times a day -we both came home and ended LD In the year since, i’ve found it harder to maintain erections, harder to ejaculate, and i’ve had diminishing erections in all ways. -now softer with my GF, softer when masturbating, and anxious abt things

I have to lie to my GF about pornography use, cause she said she’d break up w me if i used porn but i always have and never had problems.

FWI Smoker since 15yrs old (weed/nicotine) Regular porn use since 12 yrs old

Are my dopamine receptors fried? Is it death grip? Is it the smoking? Is it the porn? Is it the lying about the porn? I don’t know if bad habits are catching up to me or it’s something physical, though i had clean blood tests. It’s overwhelming and the anxiety is compounding. Any thoughts or advice would be greatly appreciated. Thanks