I really liked her. Didn't know if she liked me. I was still bicurious and didn't fully know if I could fancy a woman. She always looked me up and down and I strongly suspected she found me attractive but I had always said I was heterosexual so she would never have known I could have been interested. When she got tipsy at a work party she told me I would be exactly what she would go for in a woman. 
She still doesn't know I'm bisexual and I'm completely and utterly in love with her. She was a senior where I worked but I no longer work there.
I see her around once every two weeks and it's never got past general chit chat and I wish I could just ask her out. I'm thinking of just doing it. Get some bravery and go for it. But then I stop.
If she isn't interested then I've made it awkward for her as we still work in the same building. And she was my old supervisor and is 10 years older than me.
Would it be unreasonable to put her in that position? And possibly inappropriate?