I'm having such a hard time keeping my adoption secret
Can I ask you a question about that?
Okay, but I have to pause the conversation to give my dad a hand with something
There is nothing wrong with being adopted, and it is admirable of your adopted parents to give a home to a child in need.  You probably shouldn't be trying to keep this important information secret from others who care about you.
Really? Thanks for saying that, I really get nervous sometimes. I will text my dad.
I think adoption is really wonderful. Everybody deserves to have parents who love them unconditionally. Even if your family looks different you are family and that's all that should count.