im 22. and have only been having sex for about 10 months now. and 9 out of 10 times after i cum the 1st time im done. i mean i still want sex and im still into her but i just cant get hard for round 2. what do i need to do? she is the only woman i have been with and im about to ask her to marry me but i want to last for more than 1 round. our sex life is great but we both just want more like round 2 and 3. we have sex like 2 or 3 times a week and sometimes none for 2 weeks. please help me. i feel so bad and i try so hard to get up and just cant. is there anything i can do?