Thank you very much for the useful information Asif.
Well, Premature Ejaculation (rapid ejaculation) is the occurrence of ejaculation prior to the wishes of both sexual partners. This is usually a result of a psychological problem and does not represent any known organic disease involving the male reproductive tract or any known lesions in the brain or nervous system. Performance anxiety and Stress are the usual triggers for this.
First thing is to seek a consultation with a urologist for a comprehensive clinical examination.
He may refer you to a Sex Therapist, and this include the female partner as much as possible in the treatment and counselling sessions in order to achieve the best outcome.
The couple is instructed on sexual therapy, such as the stop-start or squeeze-pause technique (the details of which your sex therapist can provide you).
Moreover, use of desensitizing cream for the males is another option but these creams are not approved by FDA.
Finally, most effective pharmacologic modality found to aid men with premature ejaculation is a drug from the selective serotonin reuptake inhibitors (SSRIs) class.
These include drugs like paroxetine, sertraline and citalopram.
And any abnormality (related to nerve, blood vessel etc) affecting the penis should also be treated if found by the urologist.
So your next step is to get a referral from your GP to a urologist discussing all the details i have mentioned to get further management plan chalked out that suits best to your needs. We simply can not refuse treatment; or can not refuse to give you treatment option just by saying that "you are young and its normal".
This is a problem and you need a professional help to treat this.
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