I told him to just put £100 in a month because I want to be as responsible for the account as he is, and to communicate with me if he was going to use it.
Then he lends £500 from the account to his best friend for a few months. The friend then pays a £400 bill of ours (my husband usually pays 100% of the house bills and I pay for all the food). He said the extra £100 could be a birthday present for him as he isn't bothered about him paying it back.
We then had quite a big argument about this which resulted in him saying that he wouldn't put any money into the joint account at all (Because he finds it impossible to just communicate?).
How can I help him understand?