Complicated situation – he's too stressed or not that into me?

I met a wonderful guy online in March-immediate connection and chemistry (kissed me passionately on first coffee date). Wanted to see me 2 more times that week…at least twice a week through April. In May he found out his elderly Dad has 2 forms of cancer. He’s been managing his Dad’s treatments, Mom with house stuff and tried to start up a business. I fully understand his responsibility to his parents, so I would never push him. However, contact and seeing him started to diminish…didn’t see him in June though he kept contact. Went to FL over July 4th weekend (so had time for this) sent me selfie from there out of the blue (not his usual thing). Saw him twice in July, had asked to get together, but seeme pressured. I feel so bad about his Dad & pressure on him, wanted to help – so I made a dinner for them that they could portion out & brougt to his house-he reacted surprised & greatful. Again in Aug brought over another dinner as his Mom had to go into hospital for a few days. Was trying to be supportive even tho not his gf. Again he was very happy but that’s the only time I saw him. Then both of us went on our own vacations. When he got back wanted to see me right away..which was great 2x, then not hear from him in 2 wks (I held back texting), not see now for 5wks, tho he responds to texts, not ask to see me. Not sure what to do? Tell him know your busy, you’re great but thing need to focus on self??