have a crush on..
Have you ever had a crush on someone?
He is deeply in love with Susan.
Are you seeing/dating anyone?
I Miss you day and night.
I am sure that she is my type/cup of tea.
A: Jessica. I need to talk to you.
B: What do you want to say?
A: Are you dating anyone at present?
B: Not yet. What's wrong?
A: What kind of person do you think I am?
B: I think you're kind and what's more, you're masculine. But what do you mean by asking me these questions?
A: Because you're the most kind girl that I've ever seen. And I have had a crush on you for a long time.
A: Of course. I've never had this feeling before.
B: Well, we can try to get along for a while.
A: Are you telling the truth? I can't believe it. That's very kind of you.