I screwed up. Well, perhaps not?

I befriended this girl (let's call her Celimene) during eighth grade. I thought she was weird; she approached me out of nowhere, but we ended up having fun together. The friendship lasted until the middle of high school, where we sorta...had a falling out. Not over an argument, which ends things quickly, but through lack of communication and lack of understanding. We had a couple of encounters since then, but nothing came from it. About two years ago, we began talking again, we exchanged phone numbers, and began talking again. Due to our busy schedules, we didn't talk very much, and I ended up deleting her number with the assumption that she no longer wanted to speak to me. So a month and a half ago, I noticed that I was still thinking about her, and either I should move on with my life, or I should ask her to hang out and rekindle what was lost. So I sent her the message, thinking that she might ignore it (we haven't spoke in a year, after all), and a few days later, she responded to my message. We exchanged messages, then decided on a time we should meet up. I sent her the place we should meet at, and I don't think she even read it, because I showed up, she wasn't there, then I received a message later that night that asked me why I didn't text her. I lied, saying that I couldn't make it there because I was still moving, went to text her, then discovered that her number was no longer on my phone. She didn't respond. Should I apologize for deleting her number, or move on?