Do you think how you feel is obvious in your eyes, or the way you look at someone?

I'm in the closet, so I try really hard to monitor myself. However, today I was looking at this friend of mine (I really, really, really like her) and just kind of spaced out. I know love was probably just oozing out of my eyes, and she glanced over at about that time. Kind of unfortunate. Anyway. It got me thinking that maybe I always look at her like that, and I wonder if she can tell. I know I have a lot of feelings towards her (the aforementioned love being one, a degree of tenderness, admiration, etc). Do you think when you have such STRONG feelings for someone it's obvious in the way you look at them?