I'm meeting a close friend of mine tonight and I'd like to take you to meet her
It's very nice of you to ask but I'm busy tonight . I have an exam tomorrow so I meet to revise at home.
Are you sure? We're going to eat at a new restaurant. We could get home early or you could study first and come out later
Honestly,I'd love to but I'm afraid this exam is really important.
I completely understand. But if you change your mind,give me a call. Ok?