Human beings are social animals and thrive when they have a healthy social life. However, from what I can tell, you are overly dependent on your close circle and tend to get anxious when you’re alone. This is a symptom of an imbalance in your life. It seems like you’re uncomfortable when by yourself, which is something that needs to be changed.
As a 25-year-old it’s important to gain independence. I would suggest that you invest your time in building other areas of your life, such as your career, pick up new hobbies, spend more time with your family, etc. Your dependence on your friends is also an indicator of low self-esteem.
I would encourage you to seek therapy to explore further issues.
Next Steps
Concentrate your energies on building other parts of your life.