<human>: Can you give me a shortened version of the text?

I've never wanted to be that girl to change a guy. And I didn't think I had changed my boyfriend so much until his brother mentioned something. I guess even his brother got upset that my boyfriend acts completely different with me than he does with his guy friends. I didn't really think much of it; and my boyfriend reassured me by telling me that he can be completely open with me and act as silly as he wants and he loves that. But even when my boyfriend is talking to his friends on the phone or skyping with his brother, he changes a lot. He becomes this alpha again; and tries to prove himself to his friends and brothers. Is this some secret guy code that I should be happy I'm not part of?
<bot>: Should I be worried that my boyfriend doesn't act the same when he's with me as he does with his guy friends?