I didn't go to the wedding of some lovely friends last October. I was suffering badly with depression and had something of a breakdown. I desperately wanted to go but on the morning of the wedding couldn't. I don't have a dp so would have been going alone. The couple are good friends although not people I see that regularly - I didn't want to call the bride/groom on the morning of their big day so told a bridesmaid I wouldn't be coming. I gave money online to their wedding fund.
I haven't seen the couple since - I was pretty ill for several months. I've now emailed them to apologise, explain why, say their photos looked beautiful and I hope they are doing well and I see them soon.
I was actually at a wedding last summer which the bride (of october's wedding) didn't turn up to - I think for similar reasons.
AIBU to expect a reply to my email? I do feel dreadful that I didn't go.