When a man kisses the top of your head?

This guy and I have become really close friends over the past few months, and we went on a date a few nights ago. When we were about to get in our cars, he hugged me for a really long time and kissed the top of my head. I'm one of those people who doesn't take affection well, and it feels fake to me in a way, but I know that he loves me and I care about him a lot. I'm just wondering what this type of kiss expresses?

On the other hand, we went shopping and a few of the times he walked past me, he would touch my arm or put his hand on my back.
Is he just sexually attracted to me, or is it an instinual type of thing?

Thank you!
When a man kisses the top of your head?
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