I'm thinking of getting in touch with an old fren who I've not seen for a year

I met up with a fren yesterday, we had a couple of drinks and smoked weed and it was okay. I don't understand how some people can go out all the time and socialise. All you do is talk a bit of shit and then leave. Maybe because I'm on the spectrum I don't particularly get a real buzz from being around people much. If you enjoying going out with frens I'd like to know what's so fun about it.