People are selfish

Friendship has been said to be overrated. “Friends” can be fickle and sometimes you really don’t know who they are and what their true motives are. Some writers have said it’s better to have enemies than friends because it hurts less when you get back-stabbed. At least you expected that from an enemy…

And selfishness, yeah, that’s like the “original sin” of humanity. Selfishness is what causes most of the world’s problems, (IMO). You’re probably “guilty” of “caring too much.” As sad as it sounds, if you’re going to care too much, you can’t expect anything in return. So you can expect to be taken advantage of at every opportunity. That’s why Eastern thought has always said things like ‘compassion is it’s own reward’, etc. I think suicidal people probably care too deeply and feel things too deeply and don’t know how to cope with our overly-extreme selfish world.

So some of the ways people have found to cope (besides medication, drugs and alcohol, and suicide) is to give yourself a deeply religious or basic philosophical reason to care, or, to just stop caring altogether, (like you mentioned). I’ve used all three at different points in my life with varying degrees of success. Today, I just don’t care, (usually.) If I do something for someone else because of caring, compassion, or just being a decent human, I never expect any reciprocation.

Not sure if any of this helps, it’s just my take on what you’re saying.