I'm high maintenance.

Just need to have a little vent.

Popped onto fb and sent a friend (who I've recently met in person) just to say Hi.
Since I'm at work, I had to minimize the page for a minute. 3 mins to be exact.
Upon my return a msg was waiting. "Dudette, talk or I'm leaving."

I explained that I'm at work and between the hours of 7-5 replies will most likely always be delayed for those of us who do not work from home etc.

We have some small talk, then it came to me. I'm always the first one making contact. Always.
I pointed this out in a light and fun way. I'm shocked at the reply of  "holy shit, you're becoming high maintenance!"  I'm silent for a minute, trying to guage whether he was being serious or not.

I reply with, "not at all, just bored at work, things run thru my mind".
No reply from him. A few minutes pass, so in my cheeky self, I sent him the following.
"Dude, talk or I'm leaving".  The fastest response I got ever, followed as, "No, I'm out of here. Bye." - offline.

Who is the high maintenance once again?
To most this would seem like nothing, but this is the rudest this person has ever been! Ever!

This might have something to do with the fact (or not) that he proposed we be FWB and I declined.... coos he has a GIRLFRIEND! Granted she is out of the country until late March, but he still has an exclusive GIRLFRIEND!

To clarify, if he was single, I'd be up for this. I've made this extremely clear to him.
Alas he is not single, so it shouldnt even be discussed.

Input please.