You need to make plans for your future, so plan your own future.

Plan your own vacations when you want to, and plan a suitable combined vacation with this other family when you want to. If they freak out at your planning your own vacations as you see fit, then let them. Bowing to unreasonable demands because someone will make you pay emotionally if you don't is not a healthy option.

The topic of sexual education makes me nuts, because kids are certainly not now and have rarely ever been "clueless" about what adults do and delude themselves about keeping from their kids. Especially now that so many of them are carrying the entire internet around in their pockets.

There is a difference between your parents' not reporting to you everything they do and keeping secrets from you.

Your parents' views are, by current standards, out there. Getting in their faces about it would be needlessly disrespectful, but there's no reason for you to tiptoe through their delusional little terrarium as if you can't bend even one blade of grass.

Sometimes the pain outweighs the good things.

No matter what else comes, your courage will be your companion for life.