Relax. When you're with her, think of her like a good friend that you know really well and you've known for a long time. Don't be nervous or shy. It might be a big turn-off, but this might save you a few embarassing moments and help you until you get this problem under control: think of cuddling with her like cudding with your mom or dad or another adult when you were a little kid. I'm not sure exactly what you mean by touch. If you are talking about when or before you have sex, then this isn't a good idea, but if you're just talking about cuddling, say, at the movies, then what you can do is masturbate just before you go see her. This will make you more relaxed. Also, consume less sugar and caffeine.