In Bleedman's comic, Brick hasn't yet been introduced. Plus there's also the big thing on how the Girls had destroyed the Boys. Brick is an enemy to Blossom. Blossom has a crush on ডেক্সটার because they know each other and they, apparently, have a lot in common, like they're প্রণয় for knowledge and they're own হারিয়ে গেছে sisters. Etc. Does that answer your question? :)
Coz ডেক্সটার is a caring boy, and he and Blossom have a lot of things in common. Meanwhile, Brick wants to kill Blossom, অথবা at least he wants revenge.