P-pat
A person who acts like they're your personal detective and your personal gossip and your personal best friend all in one.
My friend acts like she's my best friend. Now she's telling my crush that I like him. And I didn't even tell her.
My neighbor acts like she's my mom. Now she knows my schedule and my crush's schedule and my dog's schedule.
My teacher acts like she's my mom and my friend and my detective. Now she knows my crush's crush's crush.