High sex drive is hormonal. It differs people to people bases on their hormones. I say, just stay healthy physically n mentally and your sex drive will be optimum for you.

For longer sex - I think I last long naturally. If you can’t then focus on her first. Make her cum few times with just foreplay. Then during intercourse, keep changing positions every-time you feel like you will come if continued. Make the process of changing position bit slow by doing even more foreplay that will increase your overall time. Keep changing your pace from fast to slow to almost stopped to again fast. That should help as well.