It could be related to something he has in some way "shown" you, like feeling like damaged goods/ relationship freakout etc.

Or, it could be related to something else entirely. Did you check if he was single when you got back in touch? Sorry if that's a silly question.

For me, being ignored in this kind of context is a big trigger because of past bad experiences. I also consider it a "yellow flag" - maybe not as bad as a red flag since there could be many explanations but enough to slow down and see if any other problems come up and if so what their nature is. But I am very hypervigilant about this stuff because of bad experiences!

You seem to have been negatively affected by his behaviour. To me him going MIA is a little off kilter. If you feel that way, then remember that and treat yourself well. If and when he re-surfaces, if his behaviour was not ok with you, then confront and state your boundaries. His reaction may also give you some evidence as to what the reason was for the MIA/ his underlying character/ the potential for future relating.

Also it might not hurt to be alive to the possibility of a pattern of behaviour becoming apparent (it might not, but also, it might). And whether and how you might cope with that.

The thing about money is also a yellow flag to me, given my past experiences. It might not be in your case but if it makes you feel a little creeped out it could be he is being manipulative by offering what he thinks you want and need. Just be aware of your own feelings, your boundaries and your safety. And act in line with your best interests. At least this will help you stay safe from relationship-Ns.

As I said it might be FLEAs/ACON issues. But equally it could be the start of N behaviour, in my opinion.

As to creating a healthy ACON-ACON relationship I will have to leave the advice to someone else because I'm not there yet.