Hello, 
It looks like you are suffering from 
Premature Ejaculation, you need to be treated as it may bring sexual dissatisfaction or 
depression between partners later in life. Visit a PCP, for checkup and screening tests to see if it is only Premature ejaculation or 
Erectile dysfunction. You will be suggested for some pelvic exercises & therapy (Electrostimulation of the perineal floor, start, stop method, squeeze method, etc.). Stay away from alcohol, smoking or any 
drug abuse.
Depending upon the severity of the problem you will be treated with medications like Sildenafi (Viagra), Avanafil (Stendra), etc. Avoid stress, 
anxiety, depression. Take protein rich diet, a diet rich in nuts, dry fruits, diary products, fruits & veggies. Exercise regularly, maintain a healthy lifestyle.
Hope I have answered your query. 
Let me know if I can assist you further. 
Regards,
Dr Nupur K
 General & Family Physician