I think the best emotional support for you will come from a change of thinking. 

People play on the emotions of others all the time, asking to cancel is most likely a no, asking due to a reason that makes you feel bad is a maybe. 

Now I understand having a system for each property and will remove the emotional attachment to the property.

If so, then you're more emotional that he did it without permission.

I remember being this way and I would get so emotionally invested in a deal... now I just get quotes and make sure that a worst case scenario won't sink the ship. 

As an investor yourself, you know how to run numbers, have a network of rockstar lenders/contractors/PMs, know how to negotiate with sellers, know what to look for in an investment property vs retail, know what neighborhoods other investors are active in and have potential upside, and understand the emotional side of investing as opposed to retail. 

If you are getting emotional just don't answer and cool off.

And so I asked him those questions and his response was basically a lot of emotional connection through different things that they thought would make this property work.

It felt as if some emotions got in the way and it wasn’t a win/win/win situation.

Emotions will cost you a lot of money.In addition to reading books and watching webinars, join your local REIA (thats Real Estate Investors Association).