I get it, that my grandma doesn't like me, but at least she can think of a good lie, or tell me no directly.

But, this is just ridiculous.
Me: Wanna go to a restaurant for lunch? (since, I haven't seen her in months)

Her: I had a breakfast way too late today, so, I don't think today is good. Next week on sunday?

Bitch, I know you eat more then 1 time a week.