Lol this is actually a funny question to make in this forum.
I think being immortal would actually solve the problems of a lot of suicidal people. Think about it, if you had the certainty that you can't die, then you can do whatever you want: you don't have to worry anymore about food, money, your health (if you're immortal your cells are too), being killed by other person… I personally would feel relieved, tell my parents they can fuck off about me not working and probably take a walk trip around my country at least, for a couple of months or years.
Of course at some point I would get bored and probably feel more alone than ever, and then it would be hell, but I guess I could fuck my way around enjoying life for a couple of decades, maybe even a century before that. Not like reality, that's been 32 years of worries, pain and failures.