How can someone be single if she has a boyfriend?

Open relationship?

She could be a ho I know that may seem disrespectful but having been played by a ho I know how they work. They find two to five different guys takes it slow with them while they buy her things, chick I recently met and now ignore did that shit she was dating me and a guy named willy, he called and we concluded that she was playing us both I'm not one to call someone a ho but that shoe fits that ho perfectly.

Thats just how things are.... Thats why I ask people if they are single or "single"

They are actually single. The guy or the girl they are linked to is just hanging on the bar, on the edge.

They are married so she is single.