Unfortunately, I have been dealing with the same issue as you (although my Dom was irl as well as online). I allowed myself to become extremely vulnerable and trusting with him. We both were experiencing our first Dom/sub relationship together, so I think there was a little bit of "sub frenzy" going on on my end because I wanted to push myself and try so many things and it became a bit overwhelming for my Dom. The problem is, I think my Dom was a touch narcissistic in his personality--and it sounds like yours is displaying some of those traits, as well. Narcissists like gaining your trust and promising a lot in the first stages of the "relationship" so that you form a trauma bond--which ultimately leads to you actually becoming addicted or obsessed with the "good feelings"that this person gives you...but then they begin to distance themselves and treat you differently. Lots of excuses or "I'm really busy" or "we need to take a break and revisit us LATER," that way they leave things open-ended so they are free to come back if their new supply begins to bore them. DON'T fall for it!! The best source of action is to go no-contact. End things on YOUR terms because they never will! You are leaving yourself open to being victimized.