Should I change?

I went to therapy today, and the psychologist decided to do a dynamic with my mom and I.
I'm not really into expressing my feelings and letting the others know how I feel about them, it's hard for me and I excuse myself from doing it by convincing myself that it isn't necessary because they know how I feel. So it was hard for me to do that dynamic, both of us ended up crying, and I still feel weird about it. I mean, I know she's my mom and she's the most important person in my life, but it's too hard for me to talk about feelings and stuff with anyone. I guess therapy is going to change that, but I'm not sure if I want to change it, I feel like this is who I am and I don't have to change it, although not telling people how I feel about them might be the reason why I am so lonely. Meh, I don't know. I feel like it's too difficult to change it and that's why I'm not sure if I want to change. I don't know.