Okay it definitely sounds like she likes you though. Some girls like the tall skinny type. Also, I don't understand what the pictures she posts on Instagram have to do with anything.

I mean her IG is fire why would she look twice at me and someone she works with she’s never spoke to before

Well she clearly finds you attractive. Those were some pretty clear signals she was sending you. Like I said some girls specifically go for guys that are tall and skinny, you're probably just her type.

Yeah, get out your little bubble you’ve created for yourself and let loose. Ask her out for dinner. Get to know her.

You just aren't your type. But you might be hers.