How do I know if I like someone?

Life surprises me every time. I met a guy in my new job, however, this is not the romance story, this is friendship, and I am very grateful to God that I met him because this guy makes this work better for me, I don’t feel alone there even when I can’t see him. He is genuine and amazing and special in many ways. Well, I know I said this is not romance, but I don’t know if I like him in a romantic way or only as friends.
Please, if you have any advice, I’d appreciate it