How can I be more open towards conversation?

So, I have a friend with whom I share everything and she does the same. I am at that point where if I share something, she gets really excited and genuinely tries to listen to me.

But when it's my turn, like she coming up with something exciting, I just can't show excitement. I mean I can't fake it. I am happy for her but I can't come up with, "Go girl, you got this!" kind of energy.

Haha that's about it, I would love to hear some of your experiences on this topic!:)

Sorry for my English, It's not my first language.