I've been learning to socialise sober over the last two years. Most people don't expect me to drink now and my relapses have been an intensely private affair.
One thing I would say is it starts to get easier but I agree with August. The difference for me this time is that everything social has to support my recovery. No white knuckling at parties, no listening to stupid suggestions from well-meaning friends and no accepting 'friendships' that don't rest on an authentic and meaningful sober connection.
I find that I tend to rule out evening just now. Coffees and lunches are working best. I don't always feel like it and sometimes I am uncomfortable but I recognise the danger for me in being isolated, it's important to remain connection.
Why don't you think about how to socialise in a different way, with people you feel safe with?
The mindset thing is also hugely important - drinking for us isn't fun and wont be again but being sober can be. You just have to keep working at it and figuring it out.