I really like my friend’s gf in a non romance/non sexual way

My friend has been having his gf for a few years now. During this span of time, whenever we hang out, he usually brings his gf along. This has caused not only me but everyone within the friend circle to get close to her

However, I didn’t notice it until recently that I really enjoy being around her. More so than some of my actual close friends in the group. I dont desire find her attractive but I don’t desire her romantically or sexually.

I have never wanted a relationship with her. Not only because she’s currently dating my friend but even if they were to break up, I would date my friend’s ex. To me that’s weird. In another universe where her and my friend never met, I could see myself wanting to be with her but that’s not how it is now.

I simply enjoy her company. I enjoy when she acknowledges or speaks directly to me. I enjoyed all our interactions and all of our shared moments.

I’m asking this is normal behavior? Is it simply my monkey brain enjoying it when a woman interacts with me?