guy friend kissing my forehead 🙄

I have known this guy for 7 years. We worked together and became really close (strictly friends) he knows pretty much everything about me and vide versa. He always had a thing for me and asked me out before and I said no I only see u as a friend. We put all that aside and stayed friends. Anyway I got married 2 years ago and had a baby a year ago. I met with this guy over coffee on the weekend and he caught me off guard and kissed my forehead. I hate him for doing this, I don't think it was necessary at all like wtf I'm married. Do I just cut him off or talk to him about it or what??