MrR,
First off, there is absolutely nothing wrong with masturbation and we all do it. I usually do it at least once daily and perhaps more if I do not get a release through other means. 5 -6 times a day, every day, may be excessive and could, depending on how you lubricate your penis during masturbation, cause dry skin and chaffing.
Although I think that you should continue to masturbate, I think you should try to tone it down a little and perhaps look at have more quality sessions where the sensatiion will linger longer before you cum and hopefully create a more enjoyable experience.
Also, at 19, you should be checking out the local scene re girls and eventually having the added dimension of a woman giving you pleasure which will also diminish your need for so much masturbation.
My thoughts, but I am more than happy to discuss more if you need to,
Wendy