my former teacher kissed me?

i had one teacher for 3 years of high school, and during my last year, we became closer, and talked about stuff other than school work. the college I'm attending is his alma mater. a few weeks ago, i emailed him about something and in his response, he told me where his seats are at our football stadium and to come visit him. yesterday, at the game, i went to see him. when he saw me, he gave me a hug and kissed me on the cheek. we talked for about 15 minutes and then i left. he hugged me again and told me to visit him again at another game. is it possible he likes me? the kiss on the cheek really surprised me