Help me

Okay so I started reading a series. It isn't complete

Girl was best friends with boys. She thinks the boys helped their dad kill her.

She's unrecognisable but goes to the college that they are at under the guise of someone else

Has a best male friend who is like a brother

She sleeps with one of the men in the bathroom in a bar - the man's sister is missing

The old mmcs have her dog

I think only book one is out but can't remember