dear Frenchie, welcome to BB.
Isn't it amazing that even due to circumstances beyond your control, by lack of finances, some people just don't understand, so it makes you wonder if the same happened with you would they have come to your wedding, chances are they probably they wouldn't have, but to them that would be OK, and you would understand.
Maybe down the track they might come round and realise why you couldn't, but by then the friendship would have long passed.
Common interests would have altered, as they may have a family by then, but if for some reason they do become depressed then they may try and find you, but that's hear say.
I can understand how you feel, but please don't hurt yourself and it may be a good idea to seek some professional help, because by having depression, which is a total curse, it leads to debilitating everything that you do, and I am worried about this.
I would be interested in knowing what type of activities that you were and even now keen on, as this may help answer your question. Geoff.