I think it’s difficult for two people who are in a group together to hold onto that. At least that that’s what my therapist says.. From what you say that may not even be the issue, him blowing you off at the last minute.

If you truly don’t think he’s a good person then I say you tell him that you just can’t be with him because of the way he keeps jerking you around. Stand your ground. You don’t owe him anything, much less the time of day..

I hope you have good luck getting rid of the leech.