What the fuck was that...
I understand if he's upset because she's trying to actively friendzone him... but crying like a baby until she changes her mind, that's some emotional blackmail...
It's not worst than her previous relationship, but still not much better.
If you're that upset that she's trying to "not change our relationship forever", just stop being friends. A friend constantly hoping that the friendship will evolve inti romantic love will never be a good friend anyways.