What's "fall in love" mean? Can I put something else than "love" there?

Native speaker’s answer
Rebecca
To "fall in love" means to gain strong feelings of romantic love for someone. Here, the speaker is confessing his feelings to the woman he loves. Ex: My husband and I fell in love very quickly. We got married three months after we met. Ex: I've never fallen in love. I wonder what being in love feels like.