Meeting someone new

I've been trying to see someone new because I really need to end up with my girlfriend as she is been cheating on me. So I did have chance to see couple of new woman. But the problem is each time when I tried to make love with someone new I lose my confidence and eventualy lose the irrection. I'm really stressing out over this problem. please let me know what to do or atleast direct me to a right person. thanks

Wait with sex until you know the woman and feel at ease with her.