If you are being ignored by someone who always keeps chasing you, it’s time to look internally at what you did? It probably will not be because you did something today, but you would have built it up to this point over the period of time. The only thing is, the result seems sudden, but the road to the result is always long.
We are taught to forgive ourselves, and I believe in the same. Still, if you repeatedly do something ungrateful to someone, it’s time to introspect, accept where your faults are, forgive yourself, and work towards not repeating the same thing.
Again, if you are ignored, introspect instead of wondering.