THE BATTLE OF SANITY AND ANTI -DEPRESSION

To some extent i do not want people to think am going insane or have depression but its a truth that tends to peak out of its shell.
Being a young adult, there are so many things that fgo through our minds. Many adults think that we have no right to get depressed because all we do is go to campus and have the time of our lives, so some extent that may be true but the truth in this case is highly debatable.
Everyone has a 'low day' those days that all one needs to cocoon themselves or hide under a blanket and feed on oreos and chocolate milk. Mine are usually unpredictable and come so often that i think i might die from it.
Sanity is when my mind and spirit fight the depression and this is usually a tough war which i can compare to waking up on time on a monday.
The aspect that puzzles my mind is...
IS THERE TRUE HAPPINESS?