I don't want to date a girl
What makes you say that?
It would be too expensive to date a girl.
Dating is fun! But you do not have to date these days. Plenty of people are single and happy, not a big deal.
Many people are desperate to date. They pay money to go on dates. I don't see the point in dating at all.
It is true that people normally date but it not abnormal not to want to date. As long as you are happy, you should do what you want.