Need Your Opinion Guys...!!!!?

Here's the situation, I met this girl and she's quite attractive.. we start messaging each other on February until now.. actually we are from Indonesia and we met at Singapore as we are studying here.. One day without asking when she went back to indonesia, she gave me her indo phone number and I'm quite surprise actually.. we shared some of our good and bad times too and also encourage each other when one of us down.. But here's the problem, every time I asked her to go out together she always try to ask her friend to join too as like she don't want to go out only for the two of us. But when her friends are around, she seldom talk to me and when her friends gone, she share a lot about her day to me.. Is she just shy or what..? what should i do..? and lastly in your opinion, did she like me..?