26 year old years male unmarried, while talking or imagine girls some jelly oil is coming from my penis, its since last 13years, please advise?

Pre-cum: Jelly like? This sounds fully normal. It may be a sign that your prostate gland is very full and may need to be emptied. If you were in m clinic i would ask about your masturbation practices. I would want to know if you could reach orgasm normally. I would want to make sure your erections are normal. But, this is most likely normal.