Are these signs that my lifelong friend is attracted to me?

So, long story short, I've known this girl (Catarina) since our sixth grade year in Jr, High. Cat's a very sweet outgoing person and was the one that introduced herself to me. I've always been attracted to her myself, I wanted to date her all throughout Jr. High and High School, however I was either to embarrassed to let her know how I feel, or just timed it poorly. Now I'm 23 and she is 22 and we have both moved on and dated and broke up with our share of people since our school days, but her and I have always remained in contact.

She is currently dating someone and has been with him for about a years time now. But I have noticed that in the past few months she's been taking a growing interest in my life. Today her and I had lunch together and she was asking me the most random off the wall questions, things such as...What is your favorite color? favorite animal? What do you like to do when you have extra free time?

And I realized for the first time today that her and I don't know a few of these basic things about each other...We have talked intimately about troubles in one anther's previous relationships and things of that nature...But we never thought to ask each other the most basic things. Today at lunch she also expressed how important of a person I was in her life and how she could not stand it if anything were to ever happen that would cause me to think less and/or poorly of her.

Anyway, it got me wondering...Could she possibly be interested in a ''quote'' on ''quote'' relationship with me? I've never been particularly good a noticing when a girl is showing interest in me...So that's why I ask this here...Is she interested? Or is this just normal conversation for a two friends of the opposite sex to have?