Penis problem

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My introduction:
Male 23 years old
Middle active style of life
Not fat and not muscle head
Weight 190 pounds
20-40 pounds of fat on me ... so I'm in the middle
Lift weights
Active sex life
No STDs , no prostate , no erectile disfunction
Have a lovely Gf

Describing problem:
I have little or non of the sensation as a male when putting penis into vagina ...
Well I do feel nice and soft walls of vagina cuz my Gf is tight ... it's not like a hotdog in a hallway cuz most of girls are like that these days ... We have sex like each day when she isn't bleeding and most of the times we don't use any condoms
She likes the job I do cuz it's usually 1 hour or 2 and I reach to the end ( you know what I mean ) and that's the place where I feel a little pleasure
she can't continue more than that 1-2 hours cuz she gets exaughsted but I'm still rocking hard cuz I came just once , rarely twice

when she gives me a BJ ,I have some sensitivity
But she needs to work very har on it like 10 min to get me to cum

I used to fap like 5 - 6 times a week from age like 13 or so ... and I still do ( who doesn't right lol)

As I think I lost sensitivity due to fapping too much.. I hope there's cure for it so I could enjoy sex.

Any advice ?