When I was younger I was so much more accommodating, flexible (ok, this was meant literally and figuratively speaking), tolerant and maybe less judgemental (or as I call it - inexperienced...). I guess you get more selfish with age. Nowadays I prefer smaller groups of people - if any.
My first impression was: Oh dear Lord, why me! And quiche??!! She may call it homemade, but volunteering her husband? I just knew it would be a Woolies-bought quiche. I am a cook and I don't even make a quiche from scratch for people I don't know. There are just some dishes (or people ;-) I don't waste my time on.
Shutting the world out also deprives other people of getting to know the real you. Everybody has a story, everybody has an opinion, and a lot of people are really interesting. Open yourself up to this and see how it makes your life more colourful.