Kennichi buddy... maybe you need to go back to basics. If you have been shooting airplanes and can get yourself off no problem then it is just a problem in your head. So try this. Try getting a girl and spending hours and hours with her making out, playing touchy feeling, but no actual intercourse until you are so wound up you will surely blow. If your back in the UK there is no shortage of sluts there that is for sure, acutally if you want my opinion I think all english chicks are slappers, its a nation of slappers and should really be very easy to find a girl to get off with. If your in Uni this should be even easier. Try reading some books on the subject of seduction, and I am not talking Penthouse here...Learn to read their body language, just remember if you are confident and sure of yourself you will win. It is all about confidence, which you got now, yes... just remember the chicks want to fuck too, they just pretend they don't, well actually english chicks don't pretend they just come right out and say, 'wanna shag'
Also there is no shame in getting yourself off while fingering your girl... I do this sometimes when i;ve had a pint too many if you know what I mean.
Good luck bro... maybe also lay off the anti aircraft gun for while... i know easier said than done...