Teenagers alert. FLIRTATION!! HELP ME!?

Okay, Theres this guy i met on a cruise. We hangg\ out like up to 1 am in the morning. we share alot of stories. like hes really on to me, he hugs me, and steals a kiss on my cheek. he asked me if im single, and i said yes (Cause iam lol) And i asked him if he has a Girlfriend, he smiled and Hug me and whispered in my ears, "Im gonna miss you.. see you soon" when we're back, i added him on facebook. and GOD DAMMIT! he has a girlfriend.. what does it means!?