is she trying to avoid talking to me on fb?

[045]

there is this girl that is friendly with me, but she sometimes acts nervous around me sometimes. when I'm on fb, ill see that she would like some pages like 4 minutes ago, but when i click on the chat bar to see who is online to chat her name is not on it. i have to manually type in her name in the search bar and click on her name and then wait till the message that she is offline to go away and then when it goes away i can type to her. is this a mechanism to avoid talking to people on facebook? I've chatted with her before on fb and everything seemed to be going well, we talked about our favorite music and some funny stories i told her that she thought were funny.
she is my friend on fb

[Jeff]

Maybe she isn't your Facebook friend. Try to ask her in real life, and send her a friend request. If she wants to avoid you, I'm sorry. Good luck!

[Nihar Samantaray]

The followings are may be the reasons :
1. She don't know you personaly.
2. Her account is fake.
3. May be busy with others.
4. Mobile FB.
5. Facebook in hurry.
6. She may be avoiding you.

Don't message / inbox untill she comes online. Or try to comment on her status, profile , photoes.