<human>: So, I have extremely bad social anxiety which escalates to the point where I have panic attacks and end in tears. 

Tonight he wants me to meet his best friend via VC, and I told him that I can't because of my social anxiety. He's pushing though, even though I keep refusing.

The thing that makes me feel guilty is that he's talked to my best friend before. The situation with that is slightly different since she'd messaged him months before on facebook before the Video conference though.

I don't want to cause an argument or upset him, but I don't know what to do..

Can you summarize the given text in a few sentences?
<bot>: Fiance wants me to meet best friend via Video Chat. I have social anxiety [really bad] and can't. I don't want to upset him.