In love

I think John is in love.

Isn't it nice to see two people in love?

Romeo was in love with Juliet.

“Don’t misunderstand me. I was quite honest with him. I told him, what was true, that I liked him very much, that I hoped to come to like him more, but that I was not in any way what the world calls ‘in love’ with him. He declared that that satisfied him, and so—we were married.”

So she said "What's the problem, baby?" / What's the problem? I don't know / Well, maybe I'm in love (love) / Think about it every time / I think about it / Can't stop thinking 'bout it

I'm not exactly in love with the idea of having to start again from scratch.