I think I'm not mentally healthy. Me!

You need to get evaluated for mood disorder . Please consult a Psychiatrist .

Get adequate sleep, at least 8 hours a day. No one can function only on 6 hours of sleep a day. If they can (or so they say), then either they are lying to you about how many hours of sleep “in total” they get per 24 hours or they are hypomanic. Eat healthily. Exercise regularly, at least some sort of cardiovascular exercise 5 days a week. Minimize your stress level. For example, if you are in college, take 12 credits instead of 16 or 20 credits each semester. Then try to sprinkle a couple easy classes in there. Surround yourself with positive people. Consider meditation, yoga and other mindfulness exercises. Find a good psychiatrist. Find an excellent psychiatrist. Find a good psychotherapist. Find an excellent psychotherapist. EDIT: There seems to be some confusion about sleeping 8+ hours. In general, a lot of patients would try to convince me that they only need 6 hours of sleep daily. However, I would usually ask three important questions to probe that issue further: Do you need an alarm clock to wake up every morning? If yes, then you are sleep deprived. Most people with adequate amount of sleep should wake up naturally 10 or even 20 minutes before the alarm goes off every morning. Do you take more than 5 minutes to get out of bed once you wake up? If yes, then you are again sleep deprived. Usually after a good night of sleep, one should be able to pop right off the bed. If given a choice to take a nap in the afternoon, will you do it? If yes, then it is likely that you did not get enough sleep the night before.

consult Psychiatrist/Psychologist

Looks like Depressive features, needs evaluation

Consult Psychiatrist