<human>: Can you succinctly summarize the text in 1-3 sentences?

First time I met her (we'll call her X) was my sophomore year of college at a dinner with a group of new friends. She was a freshman at the time, and I thought she was so cute. There was a little bit of flirting between us, but nothing came of it. I ended up in a relationship with another girl (we'll call her Y) that lasted a little over a year and a half. During that time, I only ran into X every once in a while at a social event or walking around on campus.

Since Y and I mutually broke it off, X has been on my mind a lot lately. I coincidentally started seeing her around more often than usual. A couple weeks ago, we both ended up in the back trunk of our friend's packed SUV while waiting for more friends to show up at a restaurant. Other than seeing her at random times, how do I start talking to her again? The last time I sent her a text message was almost 2 years ago.
<bot>: Interested in a girl I flirted with almost 2 years ago. We only see each other every once in a while. How do I strike up a conversation (text her?) without seeming so random?