I was under the impression that a particular guy was interested in me. He is super friendly and always makes an effort to say Hi..He even tries hard to get my attention by waving or saying Hey, etc. He was dating someone at the time, and I noticed that he treats most people this way. He just seems to like to say hi to everyone and be friendly.
Is there any particular way to "know" if a guy likes you if he sends confusing messages like that?
Like by comparing his actions to others? What are other subtle clues?