Dis these guys ghost me because they find me unattractive or because they fear I may want something serious?

Lately guys seem to be interested in seeing me, but than those me just before we go out.
case 1: I met this guy at a party 10 years ago, we made out a lot, I didn’t sleep with him, we went on a date after that, he told me he wanted something serious, I did not and told him I didn’t want to date him. We kind of kept in touch. 10 years later, this summer, I wrote to him and proposed we see each other. He first seemed very interested, trued to sext me, to which I did not respond, than he got cold and canceled our date the same day saying he had a lot to do.
case 2: this guy keeps matching and unmqtching me on tinder, he shows interest/writes that he’d like to go for a drink; but he always unmatched me before we could plan anything concrete
Dis these guys ghost me because they find me unattractive or because they fear I may want something serious?
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