Welcome to HCM
We understand your concerns
I went through your problem description. Masturbation
is not counted as natural by so many people of human kind. But even in animal world, masturbation is common. You need to understand it.
Masturbation is in one way elimination of body waste. Semen is a waste product and is produced whenever you are aroused sexually. It needs to be thrown out of body. If you did not do it, the body itself will do it through the method of nightfall.
You are just 19. Masturbation every day is permissible at this age, if there is no ill feeling or anxiety
associated with it. So be happy. Concentrate on your studies and career. You will have good sexual life in future. You might need counseling. Contact me through healthcaremagic.
Hope this clears your doubts. Available for further clarifications.