When I was with my first girlfriend, first time in contact with females. I get erection all the time even touching her hand. Everytime i'm a few meter away from her, I lose my erection. My erection used to be so active but now it's not. The erection occurs and then goes for so many times everytime I hang out with her. For 2 times, I had pain in one of the veins near my testicles. I've never had any pain on the penis itself.
I used to wake up with nice and hard erections, but now I don't. I can still have wet dreams.
I get no sleep erection, but during the day, I can get hard easily too. There are period of time I couldn't get hard but now i'm getting hard again. What could be the problem. During night sleep, I don't think i'm getting erections but during the day, I can get it easily now. What is wrong. Physical causes I think. Help