Is it normal to think this way about a friend?
Whenever we talk, and I start a topic, similar to the chicken and the egg paradox, she gets extremely irritated and tells me to stop when I start explaining my reason. I don't think she disagrees with me, but it's just that when I try talking to her about things like the theory of relativity and how the universe began, she just zones out and stays indifferent throughout the whole conversation, asking stupid questions and using sarcasm along the way.
We can never talk about things like politics, or how fucked up the government is, without her saying something like, "Why would you waste your time just thinking about this?" To be honest, it's true I may be wasting my time thinking about complex topics... but I don't want to limit myself, nor our conversations to always talking about Russel Peters or celebrities.
I just think she doesn't really contribute to certain conversations like the ones I mentioned above. Is it normal to think this way about her? And is it normal for her to react the way she does?