Don't let it get you down mate. I know it's a bit of a cliche in the pick up community but don't think of it as a failure, more an opportunity to learn. Remember - baby steps, keep trying and eventually you'll get there.
Also, take some positives from the experience - the fact that you went out and had a great laugh with your mates and were in state for at least some of the night. Not only that, but by the sounds of it you had a cracking night in Newcastle - maybe this was just a bit of an off night. It happens to everyone.