Thanks for the query,
This white sticky fluid is called as pre ejaculate.
It is a totally normal thing.
You dont need to loose confidence, it is not a disease.
Just relax, masturbation
is not going to harm you.
Neither it is going to affect your sex life after marriage,
Let me know if you have any other doubt.
you can ask a direct question to me on this forum, following the below link.
Wishing you good health,