Will this Cancer man come back??

I met a Cancer male several years ago through work while I was still married. We got together 1 time and spent the day together. Both of us had an extremely strong physical connection. My husband had been very ill for years and has passed a year ago. After our day together, the next day he said he couldn't see me again because I was still married. I agreed but we had sporadic contact for awhile. After my husband passed, I was talking on Facebook about dating again and he unfriended me!!

In May, the anniversary of our day, he friended me again and we have had minimal contact but it's getting friendlier. When we stopped seeing each other the first time, he kept saying it wasn't the right time, not in the near future, etc. He's 64 and I'm 63.

If I contact him, he will answer back but other than "happy birthday" he doesn't contact me first. Yet I still feel he's interested in me. Next month will be the first anniversary of my husband's death, he died on Cancer man's birthday. Cancer man's first name is a derivative of my last name...I suppose it could all be coincidence but doesn't feel like it. I am dating others while I wait to see what unfolds but I'm eeriely calm about all of this. He is very traditional. What do you think? Am I wasting my time or should I move on? He does date too, I'm sure, but I feel we're not finished yet.