2. Always hiding her phone
This is a no brainier. Only someone who has something to hide will make an effort to become very private. If your girl is sleeping out, she suddenly thinks you are prying too much into her personal affairs.
She tells you stuff like “respect my boundaries‘. ” trust me, I am not cheating on you.”
As a matter of fact, if she is giving you unsolicited confessions like: “I was out late because my friend was blah..blah” she’s probably lying and might just be sharing her national cake to the neighbourhood.