The first time i was nervous but the 2nd time i felt more confident, do u think it would happen in the future, my mate said it the girl probably wasn't good but i don't so
It's different for everybody. A lot of guys don't come from sex the first few times, some don't come unless they recieve specific stimuli, some don't ever come from intercourse (but this is rare). This is fine; if you were nervous or felt under pressure this may well have hindered you. I wouldn't worry about it.
Averages don't mean anything. Stop worrying, and stop comparing yourself to others - everybody is different. I've known guys to take forever to come, whereas women who can come multiple times in 15 minutes. It doesn't matter how fast everybody else is coming. And quite frankly, if I was with someone who ****ed me for 5 minutes and then was done, I'd be pretty pissed off and frustrated.