When friends or acquaintances choose to walk away or stops communicating with you, it can come as a surprise. In such situations if you ask for an explanation you will always not get a plausible reply. They have their own reasons to pull back or severe the ties.
In the virtual world, it’s more common and now it does not come as a surprise. When they have deliberated on their decision to stop communicating, respect it, and move on. Sometimes, I wonder, whether real life is emulating virtual world or vice versa.
No matter what the situation is, and even if the communication with an individual is for a brief moment, treat the person with respect and be thankful for their presence. Remember the good moments and wish each other the best and move on.
Holding grudges or pursuing that person relentlessly shows you in a negative light. Only with self-realization, you will be able to tackle differences and still hold that person in high esteem. Thank and wish them well, before you continue with your journey.