If you suddenly get abducted when you're outside (with zero witnesses), how long would it take before someone realize it and reports you missing?

Basically a roundabout way of asking: How much do people really care about you?

I know I could vanish for like 48 hours and my parents and older brother probably wouldn't even want to look for me (I'm around 18-25, not a minor so they have no legal responsibilities). Nobody in the world cares about me. I mean they already told me that in my face that if I went missing, they won't care.