The goal of marriage shouldn’t be to change your partner, but rather to deepen your relationship by acknowledging your commitment.
This person has only seen the preview of you and already decided that they’ve had enough and need to back away as fast as possible.
How long ago was their last relationship? Did they just get dumped by the woman they wanted to marry? If they are fresh out of a long-term relationship, chances are they’re not dying to jump into another serious one.
If it walks like a duck and talks like a duck, it’s a relationship.