Which is which?

I used to think of it, which is which? because sometimes I don't know what to answer which?

It's hard to point between two things or to choose which?

In my case, I have a difficulty on choosing which do I belong? I mean which is my home?

But for now it is clear to me which.

It just come up to my mind this difficulty of mine, when I was filling -up a paper, like a bio data or 

some other personal information paper to be filled-up.

It made me pause and think which.

But if my family was just there, whom I could used to asked which. I feel bad about it. Even though I

 used to laugh upon asking them, just to hide my feeling then.