I'm 20 and no he uses no drugs doesn't smoke and barely drinks. We where trying with condoms and it never worked so I got a depot injection! I tried to get him to see a doctor and he said he can't, he's not comfortable with the idea. As far as I know he doesn't masterbate a lot and doesn't watch porn. I try talk about it and recently he's saying he's just tired which I feel is just an excuse. I've given up trying to push it anymore as I don't want to pressure him about it.
Low pressure is a good idea , but don't give up.
Since you said you've not had "proper sex" since you have been
Together , this is not just going to go away and stands a good
Chance of becoming much more of a problem.
Keep the communication going whenever you can.
I still suspect he may have performance anxiety
Are you familiar with each others sexual past?
(which is usually a tough and mostly unnecessary subject.
It can cause many problems , but may be a clue to the present)
This could be related to a past relationship.
Being tired does not last for a year... usually.