Writing, Frustration & Solitude

Why wanting/needing to write - or indulge in any other creative endeavour - is frustrating...
You work a long week, 50 hours or more dealing with people and people and people, when you are a poster-boy introvert. But you cope and if you're good at it, no one really knows just how much you crave solitude. You enjoy the interaction, when you enjoy it, and you love some of the humans and want to look after the broken ones, but through it all you look forward to some solitude and reflection.
But the weekend comes and someone has a thing, let's catch up for a thing, some drinks, a meal, a barbecue in the backyard or a party in the bush. And you like these things, but you don't get the chance to be solitary and reflective during the working week, and you certainly can't do it when you're socialising, so when? You're tired at the end of a 10 hour day, you're tired at the end of a fifty hour week, and you're accused of being antisocial if you don't want to catch up with friends on the weekend. Catching up with friends is what they do for their not-working time. At the end of a long working week filled with humans and their wonder and their weirdness, some of us want to be alone and just write a poem.
But we have to catch up. Must catch up. We must socialise and socialise and socialise and talk about things.
Leaving no time for reflection and imagination.