So I've known my girlfriend for 5 years now, we've had things before but just started dating three months ago. We're both 18, she's not a virgin but I am. I want to have sex but when we start making out its difficult to get an erection. We almost had sex once but I lost my erection right before penetration.

What is wrong with me? I used to smoke weed for two or three years but quit a few months ago. I am also depressed and take Zoloft for it.

First... its going to take time for the weed to get out of your system... and that other medication can effect you that way as well.

Speak with the doctor that prescribed the medication... perhaps they will have some options available they can discuss.

You might be putting too much pressure on yourself, you might be too nervous, and it could be the Zoloft or the depression itself. Try to just relax and let it happen... don't worry so much about it and see where it goes.

Also, I like smoothy's suggestion as well. I know that kind of medication will affect many who take it so you may need to see the doctor and discuss this with him/her.