Sex is good for health. Masturbation is usually something we do as an alternative to the natural act of copulation. Until you get married or something, I think you should develop new interests such as learning to play an instrument, painting, etc or simply focus on your goals, to keep your desires in control, and stay motivated with good self-esteem. And remember excess of everything is not only bad but sad. Take care
Some religions teach that it is bad, but doctors say it is healthy. It might be considered unhealthy if the person does it so much that he pretty much wants to stay home from sports and school events and other fun things just to masturbate.
The above advice is good for self improvement. It is true that quitting mesturbation is an uphill task. To facilitate reduction in frequency of masturbation, Learn slow, deep and even(means inhalation time and exhalation time is equal) ABDOMINAl Breathing by practicing for 10 minutes twice a day. You can use this breath to control your sexual urge. Google abdominal breathing. Your will power alone will not help you to quit the masturbation. If you develop this breathing, you can totally quit masturbation and any other bad habits. It can be a turning point in your life.In case you do not reach this stage, masturbate sparingly. 21 ejaculation per month should be an ideal number.There are lots of benefits with abdominal breathing. visit few websites to learn it and practice.
masturbation is neither good nor bad. It's sex with someone you love. As for the future, you'll have much more fulfilling experience if you find a friend to share your enthusiasm with.
Cheers and good luck