I like a girl at work. I don't understand she likes me or not

I saw her few months ago and had a little crush on her. She figured that out from my body language that I like her (i guess), then she became really awkward. She used to talk to everyone except me. Few times our eyes met as well, she glanced at me from a distance I noticed, our eyes met few times. She started to walk past me quickly and never said Hi or Good morning, always looking down. She even used to get quite in the office meetings when I used to talk.

So I went to talk to her that went OK, mostly about our office work. Some fidgeting was there, with hands and hairs. After that she became really quite and distant. She started ghosting me and always had a poker face. Again no greetings.

So I thought she hates me that’s why she is ignoring me, so I moved away. But our eyes kept on meeting (little eye contacts).

Now she has started to say "Hi, how are you...". she smiled at me (I wasn't expecting that, I smiled as well). Still our eyes meet may be by chance, but when she talks she does not look at me, she keeps on looking at her phone .Sometime she adjusts her dress as soon as she sees me, I felt that (becomes conscious). I think she is shy but she is very out going.