Close female friend stopped talking to me after I mentioned I liked her. What to do?

[Nate Smith]

I have a female friend that I have known since about July, and we were really close. I helped her and her family out with moving, helped her school supply shop, offered her rides home when she needed it, and her family even trusts me enough to let her stay out late when she's with me.

I had mentioned through an email back in October that I kind of liked her, but she never responded or reacted to it. This past weekend though when I dropped her off at home, I asked if I could talk to her real quick. She said that she has to go but we can talk online later. She knows what I wanted to talk to her about due to a Facebook post she made. Now I'm not sure if she's upset at me or what, since I ended up leaving her a message on Facebook this morning (she has no phone) that I liked her since we didn't talk that night. She also saw the message this morning around 10pm. I'm also afraid that it may be awkward if I message her first, especially since she saw my message this morning. Not sure what to do