Bankruptcy

We all know this is a really tough time for business. To make it worse a lot of businesses have had to close their door and/or declare bankruptcy.
I just found out that one of my very long time customers, who has an open invoice, has had to declare bankruptcy.
I am not sure how I feel about this.
I am sorry for their business but I also feel hurt that such a long time customer could do this to me. I wish only the best for them. D's will be OK with this, the invoice will not make or break my business.
Still, when we find ourselves in this position it does make us conflicted. Too many feelings to deal with..... if you would like to share, I would like to hear your thoughts....