It sounds like deep down you know the answer is to break free from your family and begin to love them from a distance. They sound like they are holding you back. Whether or not your boyfriend is right for you to marry and let lead your life, you should be able to decide that on your own. You should be able to make mistakes as well without anyone constantly nagging you.

I bet it's hard being the youngest. I hear this alot. You get pegged as the baby and everyone else thinks they need to take care of you forever.

Listen to your heart on these issues. It sounds like you want to break free! Be careful, though, once you experience this freedom with your boyfriend that you don't become like them and start to try to control him. If he is as good as you say with finances and big decisions, trust him and let him lead. This is just my opinion.