You are suffering from Premature Ejaculation
that is very harmful at this very young age. Proper erection and sex timing is too important to have a satisfactory intercourse for both you and your partner. PE can eventually lead to embarrassment in front of your partner as you won't be able
to satisfy her. This condition can be solved with proper ayurvedic treatment that will help you in getting and maintaining proper erection. There are other factor also that are affecting it. Conslt me privatly for more details.