I feel bad, but I need to tell my dad he can't go on my trip with me.
Oh no! Why can't he go on your trip?
He is getting old, I don't think he can handle it.
It is good to care for ageing parents. You should help them enjoy what ever time they have left in this life and not keep them in a box.
I'm sure I can find something for us to do together.
That's good. At least you are showing concern for your father. It's good to know people care for you.