PhD students around the world have to go through same kind of hardships and stress.
You can be famous, rich and popular. Essentially, you can have money, fame, power, beauty, social skills, a great personality and you can still be lonely. And that’s because loneliness is part of biology. Hungers tells you to eat. What does loneliness tell you? It’s a sign of feeling rejected. Feeling excluded. Not feeling the social vibe of the group around you. It tells you that you need to connect with other people.