What to do with this girl situation?

Okay, so there's this girl who i have been talking to for a little while now, atleast a couple of months. We never actually hungout till this past weekend, but we hung out like 4 days in a row all day. Last night we both slept over a friends house together, didn't have sex or anything but we did hook up a little bit. Now she doesn't always seem like she's totally interested and for some reason i get caught up in my feelings and like keep asking her whas wrong. I KNOW i really shouldn't do it but sometimes i can't help it, and it gets to the point where she is annoyed. I really like her and i know i gotta chill asking her whats wrong down. But how can i get out of the awkward stage where she is like annoyed.. i think i'm going to the mall with her later and i feel it's gunna be awkward, any advice?