Hmmmm... This doesn't sound like a good question to be asked. It almost sounds like they're already viewing you as low value. I find it's better for them to say, "you look like a player", or be asking indirect questions to decipher your loyalty - because they already assume you to be of high value, and seeing others. Or saying something like, "Why don't you have a girlfriend?" - followed by positive comments (ex: "you're a good looking guy"; you have a nice personality"), or asking, "DO you have a girlfriend?" - because they already sense the inherent value, and assume you to be taken or seeing others.
It's mostly in their tone, and the manner in which they say it - as well as how they act towards you throughout. A look of disbelief or excitement followed by flirting and other interest signals is where you want to be. As well as them assuming you to be "lying", and deciphering your loyalty / honesty. Like saying, "you probably do this with everyone", and asking what you think of this girl and that, or why you were talking with them, or what you did.
Ironically, once you prove your loyalty by making it all about them, proving your worth, living up to their standards, possibly acting desperate (even if its not your intention, per se) - they seem to lose all interest, and view you as a low status loser who can't attract anyone - despite claiming to want a loyal nice guy and hating player bad boys... blah blah.
Just another one of those action vs word scenerios - where they're pursuing you harder when they assume you to be a player, good with the ladies, and not making them your priority - despite claiming to be bothered by it. Then losing interest once you ASSUME they want what they say they want (ie, the opposite), and following through on their desires. Or otherwise acting indesirable and fully loyal to prove your worth.
Crazy ****, man. This literally happens at the same time. They seem to want to know that you have options, and could leave at any time, and blah blah - without actually doing it. They want YOU to be the prize - not the other way around. It's part of that chase / challenge / needing a ****ing life BS. They want who everyone else wants; someone they have to prove their worth to, and fight for; live up to their standards; and be the special cookie who gets chosen. Even if it means going through hell, *****ing non-stop, and obliterating the competition to get there. Jealousy is generally a good thing.
It's all perception, really. It doesn't matter how actually you are - only how they believe you to be - based on the vibes they get. Players (of both genders; women do it too) have this **** down. Of course, you don't want to push it too hard, or no one is going to trust you.