Don’t force yourself. We owe charity and abstinence from superficial judgement, but we don’t owe a relationship to anyone.
You mentioned some illness. The next time something like that happens to you, you can ask the guy if he has it. Or another disease attributable to whatever behaviour he engages in. For the sake of the guy and his future, you might want to tell him it’s grossly inappropriate and totally not funny and then he might rethink his approach to women. I don’t think a guy would be heartbroken to be skipped by a girl just getting to know him. Not the same as getting dumped, at all. It will only give him a swift punch and an impulse to learn - if.
On just a casual note, however, things happen to everyone. Especially those to whom it
never happens are likely to be unable to find themselves in a situation when it actually does happen. The reaction may vary from total embarrassing silence to tons of self-blaming. I know it’s hard, but imagine what if it happened to you. If it helps any, I’ve just imagined what if it happened to me and I belong in the
never category. I would probably ask pardon and give the lady the option to finish the encounter without a further meeting to follow, saying it never normally happened to me and I perfectly understood why one wouldn’t like to meet up again after that. I would be happy to be the farthest away from there.
However, of course, I don’t find his subsequent behaviour acceptable. If it were a girl, I would distance myself from her and cross her out of the list (you don’t just leave a girl, you have to make sure she gets home safe in most instances, but in an extreme situation perhaps you could finish the meeting early - after all, playing along wouldn’t be very honest). You shouldn’t be afraid to say, “Sir, I find your behaviour unacceptable,” and rise. You don’t owe anyone a romantic meeting just because he asks, either, nor are you obliged to anything a guy expects just because you have accepted the invitation. And you shouldn’t feel bad skipping guys who don’t strike the right chord with you. But I believe I’ve said this somewhere.
Note that there are women who are not offended by such behaviour and even perhaps some that would find it funny. He’ll be better off with one of them than he would be with you, if that’s not an isolated accident but more of a part of his lifestyle.
So, I’m tormented and I feel bad for saying what I have, but this is the only advice I can give you and I believe it’s as sound as I can make it. You’re in my prayers and I’ll pray that God sends you a gentleman who won’t abuse your kindness or tolerance.
Last but not least, that’s the downside of dating. The whole pressure to accept invitations, to do things on dates because someone expects it, to play along with some unacceptable behaviour… This is why I believe it’s preferable to know someone from other situations, preferably for long enough. It’s impossible to tell that much about a person from just having a couple of cafe or cinema meetings, or a dozen. It’s like online chatting and romancing: you get the vision of the person that he or she creates, you don’t really get to know him or her for real. Just the social face, the frontend.
, then go for it. 
