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It's probably in the delivery, but I can see saying that to a friend. It would sound like an order but in a joking manner.

A: You'd better come over for dinner this Friday. If you blow me off again, I'm gonna get you.

They would need to be a close friend.

Other possibility is you've been giving help or advice on something possibly over the phone or email, but it's getting too complicated to explain over a distance.

A: You'd better come over for dinner. We can get everything done pretty quickly that way.

If you're just asking your friend or acquaintance over to dinner, I agree with Susan53's advice.

- It'd be great if you could come over for dinner. How does Friday sound?

- I'd love to have you over for dinner. When are you free?

For strong requests try adding "and I won't take no for an answer."

- I'd love for you to come over for dinner, and I won't take no for an answer.