Jealous

Draco isn't possessive.

In order to be possessive, one has to have some sort of attachment to another person.

There is no such ‘attachment’ to Granger. Sure, he knows the precise way to move his tongue inside of her to make her moan, the shape of her hip under his palm when he fucks her so hard they both see stars, and the exact pitch of her voice when she comes, but he’s not attached to her.

This is the lie he tells himself.