What does "stay in touch" really mean?

I was dating a wonderful man, who was seperated from his wife but not divorced yet. Normally this is taboo for
Me and I wouldn’t consider it but he pursued me and I relented. He was a perfect gentleman while we dated, introduced me to his three children (who I fell in love with), and treated me with respect and total honesty. We were headed in a good direction, everything was good and we were taking our time. Then one day, no communication. The next day I checked in with him and he said he was very busy and we’d talk later. The next day, I asked if everything was okay and I recieved a text of I have way too much on my plate right now, I can’t afford any more complications right now. It’s not anything you have done, just give me some time to get some things sorted out please. Let me explain, he works full time, school part time, has three kids in multiple activities and is in the process of getting a divorce. So I said that was fine. A week later, circumstances led to us texting again and he told me that he just didn’t have time to be in a relationship right now, too much going on. I said fine, maybe we’ll meet again one day and he said, “I’d like for us to stay in touch.” I said that was fine, but in truth, I don’t even really know what that means. Does anyone have any words of wisdom?