I have been friends with this guy for about 4 months. He is a friend of one of the guys in our friendship group. We usually hang meet up in a group of around a 20 friends. We had a great time, as we usually do. At the end of the night he kindly walked my back to my car, and out of nowhere he kisses me, which lasted for about 15 minutes (I kissed him back). I felt like I was back in school haha. We then said our goodbyes.
The part I am confused about is, he is moving back to America for about a year, after which he expects to come back. I have been aware of this for abut a month.
The day after 'the kiss' he messaged me saying he wasn't ready to start anything due to his current moving situation.
I am just confused as to why he would kiss me, if we both know he will be gone by January?