The fact that asexuals are going to end up alone makes me so sad. I just don't understand what would bring them together with someone with out a physical attraction.
Why be sad? It is a normal part of life for some people.
Of course, it's a bit sad though. I can't understand how they choose to be alone. Is there something wrong with them?
Have you considered that it isn't a choice at all? Even though it seems like you are concerned about asexual people your idea that their sexuality will only bring sadness could be insulting. They are able to find happiness on their own terms.
I don't get why they don't want to be in a relationship and I think they just don't have time.
Some people just enjoy the solidarity. There is no need to think that just because they are alone means that they have sadness in their lives.