Social battery seems to have completely died - any tips on getting it back?

I (32F) have never considered myself the type who is the life and soul of the party nor someone who enjoys being the centre of attention but I’ve always maintained a really good circle of friends, good network at work and always had a pretty active calendar with a few concerts, festivals and trips every year.

In the last year, my social calendar has completely fallen off. I always put it down to down getting older and everyone’s lives changing and now being in an LTR for the first time ever and prioritising making memories with my new partner. I go through waves of acceptance with this, enjoying quieter times focusing on the gym and solo dates/travel, whilst other times I get really lonely and crave the fun and endless memories of my twenties.

My issue is I’m at the point where I want to find the balance - I love my friendships and want to nurture them, despite what feels like a new stage, but I’m really really struggling with my ‘social battery’ as such at the minute. I don’t know if it’s the effects of being such a recluse over the past couple of months, but anytime around people apart from my partner I’m struggling with. I had a work event today and felt so overwhelmed with basic interactions. The idea of meeting with friends and talking for ages makes me feel drained even thinking about it. Last weekend at a wedding I had to go take time out because I was exhausted being around people.

I want my spark back but not sure how to get it, wondering if anyone has had similar and how you seemed to revive your social life without being exhausted?