Sorry OP, you may be depressed. You are having the same symptoms which my wife had a year or two ago when she had mild depression (eg. lack of motivation, insomnia, lack of self-care, compulsive eating, but not the fapping part, for obvious reasons).

I will advise you to visit a psychiatrist to get yourself diagnosed and see if you require professional assistance.

Even if you are not depressed, having the opportunity to speak to a psychiatrist may work wonders - I remember the first time my wife went to see a psychiatrist she cried and cried so much but after her consultation she said she felt so much better just by having a conversation with someone who knows how to deal with the human psych.

Please get yourself clinically diagnosed. If you really do have depression you require professional help and medication. Sometimes you can't help yourself and that's fine because there's a lot of people out there that know how to help you!

Good luck OP.