Search Results: waiting to call after a break up

So I've liked this girl at my job who is also my supervisor. Since I've been there I've tried complimenting her every now and then and asking how she's doing etc. But she never showed the same amount of interest as me and I felt like I wasn't making any progress so I kinda fell back and stopped making as much of an effort. Last week she called me during our break (she pretty much only texts me and even then it's only ever work related). But I was going through a low point in my depression so I talked myself out of answering the phone thinking that if it was important she would text me or call again. That entire week after not picking up her call I felt weird energy between us, she would walk right past me not saying a word or even looking at me but then smile and laugh with some other guy who just started there... Ever since then I can't stop thinking that I fucked up because I was too busy being petty trying to make her think I wasn't interested as some sort of revenge. And then just yesterday during our break I'm sitting in my car waiting to go back into work and I see her getting out of some other guys car smiling hard as fuck. I know I shouldn't be obsessing over her this hard but I can't help it, she's all I think about and it hurts me that I don't know how to just tell her how I feel without making it weird or awkward.