What is going through his mind?

So basically i thought this guy was really cute so i told a mutual friend of ours that i thought that and she was like he thinks your cute too! so then later that day he text me and we were talking all day and kind of flirting but nothing serious and then late in the day he asked me to tell him who won the mvp for the superbowl because he couldnt tell because he was driving and i asked driving where and he said oh to my girlfriends house. I was like woah hold the phone and i ask everyone that reads this why did he even bother texting me if he is dating someone? And is there a way i can ask him why he is texting me without me coming off like a crazy girl??