Thanks, I think it will definitely be very helpful to think of everyone here going through a similar thing. I didn't end up talking to her today because something else more pressing came up. But I do think I will tell her next week.

However, this week I was acting very awkward after I told her last week that I needed to talk to her about something big soon because, by the details I gave last time, I am almost certain that she knows what it is. Maybe I was interpreting it wrong, but I felt like she was less welcoming today. She seemed less warm in the beginning, and I'm afraid this means that after I tell her, our relationship will be different. I'm worried that she will pull away so as not to encourage my feelings. But I guess it's a risk I have to take.