Basically the situation goes like this:

I have this ex-girlfriend. Our relationship has still been her longest and I still have no real idea why we broke up. We broke up about a year and a half ago.

Since the break-up, her and I have remained good friends. I am also the only ex-boyfriend who she still remains in contact with. Now, she does and says things that I am not sure if I should take them as just friendly interaction or possibly something more. Her are some examples:

Recently she just went to Arizona. She was gone for a week and we talked every single day. Plenty of those conversations were started by her. Most of our interaction was over Facebook since it was the easiest distance medium, but there were phone conversations as well. She told me we had to see a movie in theaters together when she got back and talked about watching another movie at my house. One night as we were talking, my computer had some problems. When it booted me offline, I came back online to find several messages from her telling me to get online and asking were I was. She told me she was going to take many photos "just for me" while she was gone. She invited me to go camping with her this weekend, which I would've liked to do if I wasn't so busy. But, she knew I was busy and still tried to see if I could go. I was the first person of all her friends that she thought of asking and she told me I had to go on the next trip next month.

One thing she said that I found interesting was, randomly, she told me to go outside and look at the stars so her and I would be looking at the same stars. To me, that seemed like a sort of romantic thing to say? She also puts many smiley faces in her response. Judging by her Facebook, I was basically the only person she had talked to. I know other people had talked to her and she had ignored them, but she always responded to me, even hours later.

This last example is probably the least conclusive and probably stupid to include, but I will list it anyway. When I saw her today, I noticed she was wearing a new ring which happened to be a mood ring. After a while I noticed that the color of the ring was Indigo, the color know for meaning "highly-passionate, joyful, very romantic, etc." I know that is nothing to rely on, but I found it, um, interesting? That and I noticed the ring changed colors when she was talking to her her brother and a female friend of hers. When I asked her what that indigo meant, she said it meant she was "chill," an obvious fib. But enough about that.

So what do you all think? Is there enough examples her to prove that she likes me romantically, possibly even ready to try our relationship again? Or is this all just friendly interactions that I am reading too much into? I am going to dinner with her on Wednesday, should I make a move of some sort or just steer clear? Advice please and thanks.