I have a friend who seems like she's suffering a lot. Often I'll see her and she looks like she's about to cry for seemingly no reason. She makes jokes about being depressed a lot and generally doesn't seem to have much energy. I really care about her a lot, but we're not very close (we're talking more, though) and I'm not good with people in the first place, so I'm having trouble approaching her. I want to at least offer to help her, but I'm not sure how to start or if this is even a good idea.