Boy can't cum???

Me and my man recently got together, and the few times we've had sex, he hasn't came, even though we went at it for at least 30 minutes each time. He isn't even close after about 30 min, and I start to "dry up" and literally cannot take anymore. Is there something wrong with me or him? Or do you guys have any tips on how to make either me be wetter and last longer or him not last as long?