Yeah my girlfriend is maybe upset by me not being hard at all times...although she hasn't said anything and I don't want to ask her in case she isn't bothered and I get myself in twubble hehe.

What I like to do is lie at the side of her and rub her pussy, and feel her getting really wet and moaning. That gets me rock hard, then she grabs it and plays with me while I play with her...

Also don't think about 'oh im not hard enough' or whatever, try to think how sexy the girl you're with is etc.