Would it be weird for me to message a girl now?

[Charlie]

Basically, there is this girl that really like from my church. I usually see her once or twice a week and we talk a bit - not lots though. I have never chatted to her on Facebook before however I really want to, to be honest. She liked my latest status update. Would it be weird for me to randomly message her and, if not, what should I say? I'm not the best at starting conversations. Should I only msg her when she is online?
Thankyou in advance

Extra information:
She wasn't at church yesterday so I'm guessing she is on holiday.
I think she likes me a bit because she looks at me differently to other girls, we both have the same favourite animal, she knows I love guitar and she plays flute, I'm a year older and I wouldn't call myself popular at school, I am, I think, a bit more at church though. I don't have her number atm, how could I get that because is it weird to ask her this late?
Thanks for reading all this, haha!

[seju]

Take a chance! Who knows she may be waiting for you to ask for her number. Try to talk to her more and let her know you are interested. Best of luck!

[Thialfi]

It's obvious that both of you have some things in common, and as far as I can tell you're starting to fall in love (if you didn't already?). Anyway, you only have one life - so why not just go for it?

Worst case scenario she replies to you! Haha! Just be yourself and be confident in your way of speaking. Say that you noticed her in the church a few times, and that she seems nice!

Try to start a conversation about your interests. I know from previous experiences that if you hit that golden spot, referring to subjects - then you can talk for hours. And girls loooove talking, so just find that spot!

Don't be scared to take the first step, maybe she'll appreciate it if she really likes you?

Best of luck!
~Thialfi

[Audriana]

It wouldn't be weird if u want u can text her and ask how she is doing and go from there