I would go for number 4. mainly because, it's true - people don't care. And that's not a bad thing, it's more of how people are. Majority of them, anyway.
You know how they say, everyone has problems. Well, I dunno this is probably just me, but I feel telling people my problems will just result in one of two things
1. Them not caring because it's not their problem
2. Them not caring because they have their own problems
Besides, telling the truth and opening you up makes you feel exposed and vulnerable. Yeah, but maybe it's just me.