<human>: Can you provide a brief rundown of the text in within 3 sentences?

We're both university students studying in the same field. I got to know him through our numerous mutual friends and we've hit it off pretty well. He's messaging me and snapchatting me all the time, we hang out and we tease each other a lot, especially because we've got the same sense of humor.

He's been getting flirty with me too. I'd really like the attention if it weren't for the fact that he's been in a two-year relationship with a girl from another campus. I heard from a few of our mutual friends that he's growing distant from her. I'm a believer in the idea that people can fall out of love, but I don't want to come across as a 'homewrecker' or something to other people.

I'm getting lunch with him this week and I want to figure out his true intentions: whether he actually wants to end things with his GF and if he just wants to fuck, or if he's actually interested in me.  I usually enjoy casual sex but I've recently been wanting emotional intimacy too. 

I also want to add that we were playing pool once and his GF called. He didn't bother responding. Also, he asked me if I planned on going to Formal at the end of the year and if anyone was taking me (with a winky emoticon). I wasn't sure about either question but it caught me off guard that he wanted to know.

I need advice for our meeting? If he doesn't talk to me about dating first then how do I bring up the topic to him?
<bot>: Guy who has been flirting with me is distant from his girlfriend of two years. He's been dropping signals that he's interested in pursuing something with me. We're getting lunch and I want to talk to him about "us".