Tired of " Sharing " him !!!!! ....

I suppose I shouldn't bother spending even a moment feeling this way, but I can't seem to help it. I'm sick to death of feeling like I'm " sharing " him with all of his facebook friends - that include a large mixture of brand new women he only just recently started talking to, and many of his ex-gfs that he's actually lived with for an assortment of different time periods. 

How can I not feel like I'm " sharing " him when every single damn time we sit down to watch tv while playing online at the same time - him on the desktop - and me on my laptop - someone ends up messaging him ! It never fails to happen ! NEVER ! It appears to be that even when he's explained to " them " that he's busy playing a game, that still doesn't matter to them because they still keep saying something to him through the fb message ! 

Why doesn't he tell them to shut the hell up ?! Why does he never tell them that he's busy with his girlfriend ? The obvious answer to that I'm certain of is that he lies to ALL of them, and tells them ALL that he's SINGLE ! I'm certain of this ! It's the only thing that makes sense. Why else would they all push so hard to constantly flirt with him every moment that they can ?! He's obvious convinced them that he's Single, and that he's " looking " for someone !!!!! 

Of course if I dare to ask him about this, he'll vehemently deny all of it ! Plus he'll make it out that I'm the " bad guy " for even bringing up the subject, when I have every right to ask about it !   

I'm only human. I never claimed to be anything more than human. If he expects me to be more than human, then he's got another thing coming. No human female would willingly be " okay " with sharing her boyfriend with numerous flirty skanks online ! Yet, I'm supposed to be okay with it, and not only that I'm supposed to believe that not all of those women are online skanks ! HAHAHA !