No sexual pleasure or love euphoria.

Hi, im 22 years old So i have a problem about sex drive, that when i hit 20 years old, i completely lost my sex drive, like i don't feel anything, but before that, i was like a masturbating machine, i used to love masturbating, but now i don't feel any pleasure, maybe at orgasm only some pleasure but not as intense as before and also i don't feel anything during masturbation. also i was in love like an addict, i loved my girlfriend really but also when i hit 20, i don't feel like i want her, but still i get jealous when she talks to someone else, so i only experience jealousy, but without a pleasure being with her, so I decided to go to the next level which i touched her breast/vagina hoping that i feel some kind of euphoria or even pleasure, but i felt NOTHING, like complete numbness, just like touching ur own skin, but I get an erection !! i get the morning erection everyday, i get an erection when touching her, but I don't get any pleasure, any help ?