She pretends not to notice me when we walk by?

So I'm friends with this girl. She and I always hang out so is not like we hardly know each other. The thing is, sometimes when she'd walk by me, she'd avoid eye contact, and other times she's walk by and pretend that she just noticed me and say hi. Once I saw that she totally changed her direction when we were about to walk on the same path.

Am I annoying to her? I'd think so but she is asks me to hang out with her like any friend would on other days.
She pretends not to notice me when we walk by?
Post Opinion