Is it normal to be so obsessed with people?

There's a girl I knew in elementary, call her "D", and another girl I knew since middle, call her "A". We're all 18 years old. I stalk them both("A" knows but doesn't care, "D" doesn't know, and hopefully will never find out).

I have copied things that "A" did, and now I'm finding myself doing the same with "D".

I want to change my name, and am having trouble. I need to reinvent myself. So my name change is something I'm very adamant about. I want to rename myself after "D", and it's such an uncommon, but pretty name, so I'll call myself that for a while to see how it fits. I also tried out "A's" name on myself, but she's just a boring prick (I only like her for her quirks and I copy those too).

But I have always wanted to be someone else. I don't know how to stop wanting to be so different, but I have identity crises all of the time. I have tried to love my name, but it doesn't fit my personality at all.

I become obsessed with people.