Ex girlfriend sending me weird signals...?

Ok, so my ex broke up with me about 7 weeks ago. We vowed to remain friends. I like her a lot (sometimes I think I love her), and I haven't been able to get her out of my mind. I think about her everyday, despite the fact that I've been meeting new girls. So recently, she sent me a random text asking about something she saw on my college campus. I responded to the text, and at the end of the text asked her why she asked me the question, but she never responded. Today, I saw her in the morning, and she gave me a very warm, almost enticing, smile. Later in the day, when I was talking to someone on one of the main paths on campus, she approached me and playfully squeezed my arm. I turned to look who it was, and she gave me another warm smile. I feel like I'm reading way to deeply into this, but could she be sending me some kind of signal? Like I said, I'm always thinking about her, so this doesn't exactly help me. I would be very upset if she was playing some kind of game with me.