Orgasms

I've had sex with my ex-boyfriend and let's be honest he wasn't very good in bed, sure I liked it, but when we did it I thought that the whole sex thing had been hyped up a lot, then I thought it was probably the guy. Well we've broken up and I've not slept with anyone else (since January) and I'm talking to this guy and I've kissed him but we haven't had the chance to fuck but if we do get the chance then I think we will because we really like each other. I'm 16. Just need someone to tell me when I know I'm having an orgasm and stuff