I'll preface this by saying I have personal experience to draw from [and then some] you have a few options open to you:

You can do what is expected of you - pretend. Wear fancy clothes, convince everyone around you that your something you're not. Then you can take up your father's position, live in a gilded cage, and desperately hope no one realizes what a fraud you are. You can spend the rest of your life screaming on the inside.

Or you can leave it behind you, decide that honest self is worth more to you than the lie you'll be forced to live.