Why is she acting weird?

I have a friend she is real cool to me. We have been friends for 4 months. After 3 months of us laughing and joking around she starting to act weird. We meet at work. When she see me it’s like she smiles but try not to look down and to her right. If I don’t come to certain events she’s upset and when I do she’s overly excited. We are always laughing and talking. I show friendly affection more I used to because she playfully hit me or touched me when either of us are talking.

I take everything as friendly. But some how I affect her mood. She’s happy when I’m around and upset if I’m not. She said, “that I’m like the little brother she wants to return”. But when I don’t bother her she’s confused and wondering what’s wrong.

why is my friend who has a boyfriend acting this way towards me?

Why is she acting weird?
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