Meh.
We’re on friendly terms with our neighbours of 4.5 years, but neither of us seem to be crossing that line of actually entering eachother’s home. Even before Covid strangeness. You don’t have to be friends with neighbours, same as the mums at the school gates thing. It’s not compulsory , nor is it odd if you decline.
My neighbours, our husbands both play online games together and us the wives chat on WhatsApp and if we cross paths on the drive, and although they came to our wedding (we invited them because of all the above and because they’re just nice people, how could we not)
I don’t feel ready to progress the friendship (mainly because there’s a big age gap, they’re early 30s and we’re early 50s) and whilst I think she’s fab- a real straightforward, direct, tomboyish kind of woman, all the things I admire - I was burnt badly by my last female friendship and don’t want to risk investing again because I’m not a very good judge of character, and the last female friend who I thought was a rainbow tribing peace loving hippie turned out to be a middle class snobby backstabbing village Queen Bee stirring up poop woman hater 
.
I really like my neighbour, but she ‘hates people’ (her words!).
She has her horses and dogs, and her husband is her best friend, her world is all good and safe. Our kids are opposite ages too: mine are 11 and 13 and their child is about 5 or 6. So not quite young enough to be going on trips to parks together and stuff.
It really is hard work maintaining female friendships. And I’m always conscious that I’m 20 years older, so whilst I may have had my days raving in Ibiza in my 20s, travelling the world, riding motorbikes, and so on, to her I probably just look like an ‘elderly’ woman who likes knitting and gossip and she wouldn’t have anything in common with me. I dunno!
I feel protective towards her because her other neighbour is blatantly vile and machiavellian and I think there’s been actual fisticuffs, but I think we both like our privacy. That said, I wouldn’t hesitate to rush in and rescue any of them from a fire.
Conversely, neighbours other side, we only ever say hello in passing getting into our cars. Yet we know so much about them because my husband’s ex is their adult daughter’s friend. We know she’s had affairs..., and she knows all our medial history - heart attacks, miscarriages, Covid test results, the lot -because she’s our doctor’s admin staff 
!
So probably a good reason not to pursue friendship with them even if they are closer in age to us....but they’ve got a caravan, and we’re not ready for that middle age stuff yet, we’re still looking at funky VW campervans with surfboard storage !