ME TOO. I feel as though I'm being ignored, even when I rationally know I'm not. My SO could be at work or hanging with other people, but if they don't answer I begin to feel as though I'm being ignored. I react in a pissed off way and they are left being confused as to why I'm mad.
If they just said in an honest way, Hey I'm busy for a bit we can talk later -- I would have NO PROBLEM what so ever. I just hate that people can be really passive aggressive about things, so I expect that everyone is passive aggressive -- thereby not having the balls to stop "ignoring" me.
If that makes sense.
Then I begin to try harder for a bit to get their attention, making it seem like I'm clingy. Then when they continue to evade, I cut them out of my life.
Sometimes, (hell, most of the time) people are left wondering why I'm no longer speaking to them.