From someone who used to be content with being alone most their life：Nothing hurts as much as being forced to be alone when you have become used to sharing life with someone else.

Consider the opposite though：imagine being trapped in a relationship both sides feel compelled only "for the Kids". If you feel bad for being alone, realize that what you got is the closest a human can be to true freedom. Only in being alone can you be unconstrained by the wants or needs (hell， just the wishes) of another person.

Your future self might envy this luxury of yours, so appreciate it while you can.