Hello there. There are a lot of things what you can consider. 1. Indulge in a lot of foreplay. 2. Practice stop and start technique. As in, when ever you feel that you are going to ejaculate, just stop for a few moments and then gradually start again. 3. Have a well balanced diet and drink lots of water. 4. Smoking is a big cause of such problems. 5. Avoid smoking and alcohol intake. Consult a physician in person for further help. Regards