Does she like me back?

[J-T]

I REALLY like this girl, I've had the biggest crush on her for so long now, were friends, not like super close, but friends, I can't tell if she if trying to flirt or not, sometimes when she passes me in the hall, she'll say my name in like a flirty or teasing way, occasionally she'll even touch me.....but sometimes she won't do anything and just completely ignore me, I don't understand her. She'll tease me sometimes (in like a silly/flirty way, not mean way) Also we have had some really good texting convos (on Facebook cuz I don't have her number) but I ALWAYS chat her first, she always seems interested and she always seems like she wants to talk to me, but yet she never messages me first. She says my name a lot (in texting and in person) if that means anything. But I just really like this girl, I love her actually and I just want to know if she likes me or not.
I'm 17, she's 16
Do u think she like me why or why not???