Sorry for length. Context I'm also being assessed for AuDHD (rest of my family all diagnosed) and I have always found some social expectations or things not being made explicit confusing.
Two friends and I got close in an old job we started almost a decade ago. Friend 1 left job first, I left during COVID. Friend 2 left a bit later but moved cities after COVID. I then moved to a different city almost 3 years ago after my wedding which both friends came to.
Since then, it's been the odd group chat message but I know Friend 2 has a stronger/warmer relationship with both of us than Friend 1 and I seem to have with each other. Friend 1 and I even lived together for about 6 months while working together, no issue, she moved in with her now fiance.
Most times I've seen Friend 1 more or less since COVID, I've had the sense something is off. When I went to her birthday a few years ago, I was engaged but didn't mention it apart from one moment the whole evening when Friend 2 asked me about it. Friend 1 came up right as I was briefly talking wedding planning and suddenly looked visibly almost upset but acting like she was fine. She was in a strong relationship to her now-fiance. Later that evening I was chatting to her live in boyfriend (now fiance), asked him about her birthday plans and he said "I always tell her if I'm not sure what to get her, I can always propose" then looked at me quite pointedly. I said something like ah yes always got that one up your sleeve! But it seemed like something they'd spoken about or that he wanted to make the point they could get married... Of course? And happy for them whenever they were ready?
Her more recent birthday couple years ago we drove down and had to rent a car to do so. She seemed like she didn't really want to chat much to either me or DH.
I've had a baby since then and even though she asked after him when he was born, since then she's basically ignored a good number of messages of mine in the group chat or to her individually, ignored photos of my son - I've only sent a couple as it did hurt to have them totally ignored. She's responded when I've asked how wedding planning is going or her job but doesn't ask me any questions. She messaged me individually last year to ask if I was going to Friend 2's baby shower and I said I couldn't make it (very young baby hating the car seat and a 4h drive each way), I'd love a life update and then no reply from her. Then again very recently to check my name for her wedding invites, we managed a little chat about name changes after getting married and that's it.
Anyway I would like to go to friend's wedding, I don't have an issue with her and sometimes I think I'm reading into things and she's just busy and we've drifted but not a reason to cut her off or not make an effort myself. Having seen the invite, it's on a term time weekday (I'm a teacher - but can get one day off in a year if I then cover colleagues for equivalent time) and no kids, different city to us as well now we've moved away. My DH did say I could go for a while and he could have our son nearby if we travel down together but I feel like she doesn't even want me there - then why invite me? I really don't understand. Friend 2 is also a bridesmaid and Friend 1 has visited her and her baby recently but doesn't ask after mine which has hurt somewhat.
I think she doesn't really want me there but feels obligated to invite me, so I should not go? The only person I'll know there anyway is Friend 2 so not that appealing to go on my own. Or is it incredibly rude and friendship ending for me not to go?