avoidance

How do I explain this. She doesn't want me to talk to her. A mere sight of her makea me wanna run to her and say how my day went in short and listen to her explain about her day very briefly and inturn reply something good to her. Tease her a little bit get beatings from her. Ask her how her duty day is going and offer her anything as sh needs to complete the busy day. 

But th moment I see her I have to look the ground and passby her without making a single eye. Concact. But even then i saw a small or the smallest gesture wen sh looked at me.