Hello Adam,
It's unfortunate that you are experiencing such problems and difficulties, you should be strong, full of energy and vitality at your age.
When we don't do much, we accumulate a lot of energy, and we know that the sexual energy is constantly building up in our bodies, until it reaches the stage where it draws our attention away from our surroundings and pushes us to act, the pleasurable sensations that are produced when working with this energy are irresistible to us, thus it can be incredibly difficult to abstain from indulging in it, especially if we are accustomed to indulging in it multiple times a day, everyday.
We form an addiction to the pleasurable sensations that are experienced through the orgasm, if you take your physical, psychological, emotional and spiritual health seriously then you should start managing your sexual energy with mindfulness and control, don't spend it as quickly as it arrives, that is absolutely fruitless!
Rather, if your ultimate aim is to develop spiritually, then you should utilize this energy to fuel your practices, if we have no energy, if we have exhausted our powerhouse, our generator, then we cannot illuminate our practices.
Look at animals for instance, they are not having sex five times a day everyday, certain animals may do this when they are in heat but that is a relatively short amount of time when compared to a full year, some of us are doing this daily for many years, no wonder we get sick easily, are exhausted and have a myriad of psychological, emotional and physical disorders.
I have linked you to some Pranayama practices, you can find the link down below, basically through Pranayama you are transmuting your own sexual energy, this transmuted energy will in turn help to heal your mind, emotion and body as well as to fuel your spiritual practices, so rather than letting it out, your using it in a holistic way.
And the Dalai Lama's view:
Note that the Dalai Lama classifies the emission of semen or orgasm as a fault implying that it is not a healthy practice.
References
Sacred Sex
Sexual Organs and Hormones
Getting Started
Techniques to Cultivate the Sexual Energy for Single Students
Anyhow I hope that this information helps you to get better!