If people change how they are towards you, they're not even supposed to be in your life to begin with. If they want to be part of your life, they will find time to communicate.
So yeah, life goes on.
Remember this.
How they treat is your value to them. If they dont value and treat you well, walk away. Maybe your mission for them is done.
Other people would love your presence. Do not allow yourself to be an option. You deserve better. You deserve more.