don't let dreams be dreams, anon
being inactive will only feed your sadness, which will fuel inactivity, and so on.
find something worthwhile to do, some kind of skill. work on that, master it, find happiness in achievement. be with the people you love and find happiness in community.
i'm fairly certain people on this very board are going through the same kind of feel as you. hell, i have episodes where all i feel is despair and sadness about my life and the world. it's normal to feel like that, but to simmer in it will only harm you.
happiness must be earned, anon. go after it.