onlyme

I am the head of a community group. Recently I invited a man from a neighboring town to speak at one of our meetings. We had a nice chat afterwards and exchanged email addresses. He emailed me a couple of days later to thank me for inviting him, and in his email, he made the remark "when you smile, I lose my train of thought" and a couple of other flirty remarks.

Is he hitting on me? He's married - and so am I. I'm not sure how to handle this or respond.