I can't speak from experience because I'm not demiromantic, but here's something I found:
"- You desire romantic relationships, but do not develop instant crushes or fall in love “at first sight.”
- When you first meet someone you find attractive, there’s an absence of romantic attraction, although you might be sexually attracted to them or want to pursue a friendship.
- You strongly identify with the “friends-to-lovers” genre.
- After looking at your dating history, you notice that romantic stirrings only began once a heartfelt connection was forged.
- It’s easy for you to have a sexual relationship with someone, but love only happens after you’re emotionally invested."
I hope this helps at least a bit