My boyfriend and I have been dating for 6 months now and he’s just sent me this message

You’ve changed so much I preferred when you was that shy girl who kept to herself and didn’t show constant attitude and literally needed me to be happy.

Just stop acting so different can you go back to how you was when we first got together.

I don’t understand, I’m a shy person and throughout this relationship I have felt like I’ve grown as a person and have become more confident in myself which I thought was a good thing. I love my boyfriend to bits but I don’t understand this?