Selfish / shellfish
(this is related to the idea that one can become selfish because of the need for validation + the defense mechanism ofpushing people away if they don't give you the attention you've learned to rely upon = creating a barrier / shell to protect yourself )
But nobody should crawl into your shell with you. It's a pretty small space, after all. You'll both suffocate in there.
(Share instead of snatch / open up + be honest instead of clamming up 😉)