I don't know whether I am attracted to someone of not, whether romantically or sexually. How do I find this out for myself?

Not understanding your own feelings can be quite normal. Many people have a tough time understanding their own emotions. It is nothing to worry about. Mostly, one has to focus on their actions to understand what their heart wants. If you pay attention to your reactions to things, you can understand your feelings very well. It is a trick I have been using for a long time because I can't understand my feelings towards people either. Moreover, not understanding whether you are attracted to someone or not, and feeling like you are not attracted to a person/people at all can be caused by something else altogether too. There is a term for the cause as well; Asexuality. Asexuality is the lack of sexual attraction to others, or low or absent interest in or desire for sexual activity.