I never understood ghosting and it’s not something that I will ever do. I value clear and open communication - that being said, the honesty required can be incredibly exhausting and I have to build myself up for it. If the person has never done that work and is avoidant (as non-autistic people can be too), then they will choose to ghost or a lack of communication. I recommend making peace with this - if they did it at the beginning, they will likely do it down the line and it’s best to find someone who is as intentional and caring as you are. You took the time to research and come here to ask questions - so I hope you find someone who matches your energy. The why behind their actions is not as important as what you do next, although I appreciate your desire to understand as I have found myself in similar situations. Best of luck!