What should I do when having dinner with my ex?

So my ex and I have not talked for a little over a month now after some things I did to hurt her and she to hurt me. Recently, we began texting and our conversations recall memories of our past relationships and seem kind, laid back and funny. She sends a lot of smileys and usually replies instantly showing that she is interested in talking. She said she was craving a certain food that we mutually like so I suggested we go to one of our favorite restaurants. When I ask if she has a boyfriend, she says that there is someone in the picture and then asks if I am trying to get back together. I really think we just went through a rough time and at least I can see us working again. I just don't know if I'm getting mixed signals and she's moved on or I she's waiting for me to make a move. What should I do?