Discord - Mind has a mind of its own

Today was one of those days when you can't comprehend what exactly you want in life.
I am not saying I have everything, but I have what I always wanted - a normal peaceful life- but never really believed I will have.
For the last few years whenever I felt depressed I had/gave-it a reason immigration woes (no longer an issue), financial unstability (basically living of Dad's money/career establishment (no longer an issue), someone to love me unconditionally (no longer an issue), everyone I care for is healthy and happy...There isn't anything thats lacking then why do I feel so depressed, I have no reason but I feel so low so low that I wonder what is there to live for.