Being under a blanket

A feeling of trust, comfort and intimacy, like a child hiding under a blanket from their parents. Allowing someone under your metaphorical blanket implies letting them into your private world and trusting them.

Being under a blanket
exmp1:
I told you about 'my crisis' not because it might help you, but because you are the one who I want to know about me, "be under my blanket"

exmp2:

A: I don't care if people would or would not be happy that we date. That is mine.
B: What do you mean?
A: You are under my blanket.

exmp3:
A: I've never considered myself being under your blanket.
B: Wow.