I get it, really. Dean is not normal and he owns it. He has to because otherwise it would only hurt more for him.
Sam is the only human being that could understand him because of their shared experiences and upbringing. Dean and Sam are both not normal so when Dean sees Sam living a normal life, making genuine connections with other people, NORMAL people at that, jealousy boils inside of him.
When you're a fucking outcast freak compared to everyone else, seeing the one person you thought understood you be able to blend in with other people makes you feel like you should just fucking die even though it shouldn't be their fault but fuck, that person should be YOURS.















