Hello Mohammed abdul aleem,
Thanks for your query.
Most probably you have Varicocele
It is a condition of scrotal veins which tend to dilate and tortous.
It is more common on left side as is in your case.
It is also one of the most important causes of infertility
It needs to be addressed surgically.
You can have a happy married life , but your fertility cannot be assured by me at this instant.
It needs proper evaluation.
Hope I have answered your query.
I will be available for your follow up queries if any.
Wishing you good health.