Need advice on a possible blossoming long distance romance in early 40s?

About 8 weeks ago I met a 39 year old divorced insurance adjuster online because he said he was living in my state but was actually only living there for 4 weeks. Knowing this after speaking with him a bit, I decided not to meet him because, as I said, there is no point as you don’t even live here and if you like me, you will miss me greatly when you leave in two weeks. To which he answered, but I’m here now. We met and clicked in a way I have not connected with anyone in three years since my divorce. OR, is it simply because he doesn’t live here and is simple unavailable. Upon flying out he texted and said I can see you in three weeks, to which I’ll admit I was completely shocked. He is 39, I am nearly 43, and he is honestly the most beautiful person, humor and looks wise, I have ever been around in my life. We spent two full nights together, but did nothing but kiss. I was wise enough to understand I might not ever see him again and have enough other drama in my life than to add being hurt by a guy I had sex with and never saw again. So we simply marathon texted and spent the 48 hours together.
Upon him being back at home, he texts once every 7–10 days, to which I then reply a day later. I do not initiate texts but have sent 2–3 cute photos since he left.
I told my friends if he lived here, I would more than likely be in love with him, but since he doesn’t, I now need to protect my heart, as he has a 9 year old son and has only been divorced at this point 7 months.

We were not able to coordinate the 3 weeks later and have both said he would fly out here again in August, which would be 7 weeks from when we saw each other last.

Thoughts on smartly keeping contact, thoughts on the situation as a whole. I guess I would like advice on how to…Keep him.