To piggyback on what others have said, i also recommend you slow down.
This time frame is not in days or even weeks. It may take many months or possibly years to turn around, if it ever does and if she likes the changes you are making to yourself.
In the meantime, take yourself out of the equation as much as possible while you work on yourself. Read self-help books, inspirational books, relationship books etc.
When she does speak to you, listen more - much much more. Speak less. If she asks why you aren't speaking say something like "I am just here to listen". Before you respond, think about what you really want to say. Then look her in the eyes and speak calmly and clearly.
Let her initiate the conversations. If she wants to speak to you, she will.
And most importantly, do not focus on what she is doing. Focus on what you can control - you.
