Sorry, not a native a speaker.  
So basically the title. He has been in a bad place for a while but it has gotten worse with finals coming and the chance of not graduating. Even if he graduates, which isn't very likely, he is stuck working for his father with little to no pay six days a week. He doesn't want to do anything because ,,it doesn't matter and I don't matter". I don't know how to help, except to spend time with him so he isn't alone, but I'm not sure if it's helping or if he cares. I am not sure how serious his suicidal jokes are but I feel because he knows it will be worse for the people around him, he won't do it. Please give me ideas to make him feel better about himself or the world or anything.