[potamic]

I'm sorry but this is going to sound bleak, but you cannot learn to be alone. If you are alone, it is pretty much guaranteed to affect mental health. Psychologists everywhere stress this fact very much and there is apparently plenty of evidence in their literature. The human brain is hard wired to function in a social context and there appear to be many innate pathways which are only activated by social proximity and interaction. Even social animals, which are nowhere at the level of humans, struggle when they do not find social fulfillment.

You have to find ways to get people into your life. Whether it's old ones who have lost touch, or new ones you start bonding. 32 is plenty young. You still have the bigger half of adult life to go through. In this modern age, I wager a sizable segment of society falls into your same bucket. As much as you don't enjoy company all that much, you will do well to find some and create boundaries. But living alone is an impossible option. That's a battle that won't be won imho.