My friend copies me a bit too much?

Lets call her Q. Q and I have been friends a long time, since we were 3 years old (now we’re both 19, so that’s a good long friendship). I love her, she’s my closest friend and we tell each other everything. I am very grateful to have her. The thing is, I know spending so much time together can obviously lead to one adapting a few of the others features, you know? Like picking up on certain words and slangs, growing to like the same things. But the thing is, she and I are VERY different people. So when I first started noticing that she uses a few words that only I use (I use the word bananas instead of crazy and I say a few words differently so usually my friends and I laugh about it, they became my ‘thing’), I found it cute. But then time passed by and I noticed that it wasn’t just the words, it was literally my personality traits that she was adopting as well, despite how different we are. It goes beyond that as well, she copie the way I talk, type, things I like, my tendency to obsess over things, the kind of jokes I crack, even my fucking aspirations and dreams for the future- I feel like she just liked my career path and decided to take it even though it’s something I bet she would have never done had I not been excited about it. Now among my friends, Im considered slightly weird, growing up in school I was always complimented for my individuality and uniqueness and although I was insecure about how different I am, I definitely learnt to celebrate it and it is actually personally my most prized aspect. With my friend building her entire personality on mine, I feel like Im losing my individuality when I spend time with her. Its so hard to explain and this probably sounds stupid but Im so annoyed. I don’t feel like sharing ideas with Q because I don’t think she’ll appreciate them, she’ll steal them. Qs a great girl with an amazing personality and heart and I don’t know why she wont embrace her own character. I dont know what to do. I dont even feel like seeing her anymore because we cant talk- thats how different we are. We also cant talk because I feel like everything I say to her, she’ll ‘learn’ it and it just gets on my nerves. God now that I’ve typed this out I feel so stupid.

How do I cope with this?