Ok hi im new :)..I'm 20 years old and I was with my new gf last night and we started doing things like masturbating etc, firstly me on her which was fine then when she went to me and I noticed that I had ejaculated too soon. I didnt even realised I had done it but we carried on, but because of this I couldnt get it up..I could only get a semi :p which wasnt really a prob until we went to have sex, and I could only get it half up and shes pretty tight so basically we ended up not doing it, even when we kiss I dont get an erection like I hear most ppl do. Even tho I still get the feeling of one. And when I have been on my own masturbating I have no trouble at all getting one..Im just worried either I will ejactulate too soon and it will ruin it or I will not be able to get it up. What can I do?

Cheers fellas