For friends, if you are at a face-to-face school, try joining some clubs or finding people with similar interests as you. Take a chance on some people, some might seem like you don't have much in common, but they can surprise you. One of my friends is into theater and drama and musicals, while I have seen, maybe 4. But we both like writing and get along pretty well. Another friend is more athletic, while for me, no. We actually don't have a lot in common, but we still get along with each other and hang out here and there.
For depression, *hugs* every night has its dawn as long as you don't close the curtains. (For fewer metaphors, depression doesn't last forever, as long as you keep hope and are willing to wait and fight for the end of it.)