tips to last longer during sex and not blow my load as quick?

hi
im a university student and sometimes when i am stressed from the workload i only last 1 minute in bed with my gf. usually i last 5.
any tips on lasting longer, a friend told me to think of sports or other random stuff during the act, but i tried and i just cant do it

any meditations or crazy stuff i can try lol, i'd like to impress my gf and wow her

jack off before u have sex