After a year of ignoring my existence, suddenly she was interested to ask me how I am. What is wrong with this?

Maybe she wanted to talk to you..A girls mind is a crazy place to be sometimes.. But maybe she had been down some roads with other guys and realized that hey maybe i like this guy and when she texted you to see how you were doing maybe that was her way of reaching out to you and you completly blew her off..Text her and see whats up you may be suprised in the end...