Avoiding people and needing everything to remain the same can occur with anxiety, depression or other stress-related conditions, but it cannot be diagnosed from one message. Since this is affecting your daily life, please speak with a psychiatrist or clinical psychologist; CBT and gradual, guided exposure can help significantly. I would first understand your sleep, mood, fears and how long this has been happening. You can book a Practo consultation for a structured assessment.
Next Steps
Seek urgent help if you have thoughts of self-harm, feel unsafe or cannot manage basic daily activities. Otherwise, arrange a mental-health consultation rather than continuing to avoid situations alone.