I have gone through the same situation. If you let it go like I did, get worse. Believe it or not, you're going through depression. Things I advise you to do and you will not do:

- Most importantly, go visit a professional, one who specializes in emotional intelligence. - Make sports more than half an hour a day every day. - Switch to a healthy diet, no snuff, no alcochol, and low in sugar. - Lower the workload or leave it for a few months. - Give yourself time, and changes of activities, places and people.

By doing these steps you will again be the same. If you need anything you can contact me.