I think it’s mostly in my head now because it plays on my mind so much but I have never been able to cum from anything other than masturbating, but I also have a really tight foreskin so sex doesn’t give much sensation. Not sure how to go about this
Me too.
It’s been years since I’ve gotten off anywhere than my hand.
I was a daily porn/solo guy. Sometimes multi times… never was super hard. But always could finish. Relatively quickly also. With a partner- I’m semi or fairly hard for foreplay/oral/handy…. But the minute I make a move….
Anyway, I got really open with gf. I suggested she could help by talking kinda dirty, encouraging me and telling me exactly what she wants. She’s done just that and tho I still need my own hand to finish, the time has decreased. I can finish with her watching playing with my balls and encouraging me in like 10 min. A month ago it took 30-40 min. 
Pretty sure the anxiety is much less, allowing me to finish.