I would say that it’s a 50/50. I mean, it is pretty obvious that you’ll change or at least will show other side of yourself whenever you’re with your special someone.
My only relationship is one I keep in my heart with a lot of esteem, because my ex-girlfriend is probably the only person in the world that can understand me. She has this amazing ability to read people like a book, and she could pick me in whatever mood I was and treated me as I wished to be treated according to my mood.
Now, I’m an emotionless void of human being. But I had to return that appreciation, y’know? So I tried to be more empathetic. And it worked. For once, I learned to read someones emotions. Of course I didn’t completely changed the way I am. For starters, she wanted to be with me because I am who I am and she told me multiple times how much she admired me for that feature only.
So, my advice for this would be that, it’s ok, you’ll probably have to change one or two habits you have. But you have to feel comfortable on them. You can change this little things, but you can’t change your essence as a human being. Once you start getting farther away from that essence, you know that something is wrong and it’s unhealthy.