If he has schizophrenia and he actually left you a message what importance is in the card? It seems that you expect a very high standard from him all of the time and he is in withdrawal because of it

If he feels attacked because of a piece of card paper he may see that as totally unfair and unreasonable There are those who never buy cards or gifts and those who never expect them and they survive well

Rhiannon and her man buy gifts when they feel like it but are not pressured to at the religiously based days

It is regretful you feel the way you do and is it sorry we are that you are hurt but please put yourself in his shoes and imagine if you can how all the pressures may be splitting him into someone who can not cope or manage

Wishing you well