I don't want to take my boyfriend to the airport
Why don't you want to take him?
I don't want to talk about the reasons.
You don't have to explain if you don't want too. He is your boyfriend though so you should try and help him if you can.
He can find someone else to do it. Besides, he's a bad boyfriend anyways.
That isn't a nice thing to do. If they ask you for a ride and you have no plans, then it is selfish to not want to help out. If this is about your relationship, then you need to communicate that to him.