What I've learned from observing people is that they don't like talking about or thinking about things that make them uncomfortable. Maybe when you get those responses, it's from someone who asked you, "How are you?" or "What's up?" I used to answer those questions honestly, but that's not what anyone wants. They want you to say, "I'm doin' good!" or "Nothin' much, just chillin'." It's not really conversation, it only looks like that on the surface. It's more like... a handshake, or... clicking your heels together, raising your open hand, and shouting, "Heil Society!"
Sorry if I'm being harsh, that's just my experience. It's especially hard here in the Midwest, because if you can't muster up an appropriately enthusiastic "Hey, great, you?", they probe deeper, despite not wanting to, because they know it's expected of them. Then you're expected to say, "No, really, just a little trouble at home. It'll work itself out." Or, "Nah, I'm fine, just had a fight with my girlfriend." Then they can pity you and drop the subject and go on with their day.
Woe be to you if you answer honestly along every level of this tricky bit of societal "bonding". Eventually people stop asking, which sounds like a good thing, but for some reason it's not. It's like a sign they don't think you're normal.
I told someone once, before I knew what Asperger's was, that I was born without common sense. He said, "Well, that's dumb. If you know you don't have common sense, doesn't that mean you actually have it?" Typical people just as often don't realize how ridiculous they sound as we do.