1) Get bloodwork and see where your hormone levels are at
2) Eat Right and workout obviously
3) Don't jerk off but have more sex!
4) Think about making her cum and enjoying the pussy
5) Pop some pills (cialis or viagra)
When I was in my 20s, I had trouble lasting as well but I wasn't working out and my diet was shit. In my late 30s, lifting, eating right and on TRT my sex drive is on point!