The problem is that people think socialisation is some mandatary thing, like food or air, but the truth is - it is not.

We are born alone and we will die alone, there is nothing bad about it, it is just how life is. You can have people around you but in your thoughts in your emotions, in your experiences you are always alone. There been lots and lots of people who would live just fine, very productive and profound lives and were socially alone.

Once you realize it - the problem is gone, or rather you see that there was no problem, just a certain conditioning by society which you grew up in. What can help here are not psychological nonsence, but some meditations definitely push you towards this (and other types of) realisation.