Rocket was an asshole. Plain and simple. He told things like they are with a side of sarcasm, just to spice things up a little. If people didn’t like it, then he showed them the door with a snarky grin. So when he joined the guardians of the galaxy, he was instantly introduced to the whole friends and family thing. It was something he had been without for a long time.
Needless to say, he didn’t like it.
Worst of all, was apparently you wanted to be friends with him. Why couldn’t you just write him off like everyone else? No, instead you opened up with him and laughed at his stupid jokes. You listened to his crazy ass stories and followed him around the ship. He didn’t like how comfortable he felt around you. So he pushed you away.
He would make cruel jokes at your expense, often getting Drax to join in with his big boisterous laugh. He made things for you in the ship hell with his outlandish pranks, even going so far as to ignoring you altogether. He did all of this within moderation of course since he didn’t want you gone… he just needed to push you away. To keep you at a distance. Nothing more, nothing less.
Little did he know, you were at your limit.