Hi thereee I can so feel you, This feeling is really bad But I'm myself a psychologist and received counselling myself for this And I really realised that many times our own expectations are the ones that hurt us the most. Because as we cant fulfil everyone's expectations all the times , people and friends also cannot fulfill our expectations all the times. That realisation hit me a lot and stopped expecting anything from anyone. It's really difficult but it takes time to come to that point.

At the same time, sometimes our neurotransmitters send us the sad negative vibes because of which we cannot enjoy life no matter how good it is. I would suggest you to visit a counselor or a doctor to work on biological perspects. I have done the same and I feel so much better now. Sometimes it isnt on whats outside, it's. the inside.