Why is upset with me?

I have no kids but I started a new relationship I agreed to pay for the kitchen I sorted out accommodation but my boyfriend told me he has no money and ask if I could pay for him and his son to do things while we away I said no and cancelled the holiday has since the relationship I have supported him and his kids he has 4 months to save up but now he blame me for let him and his kids down he has not paid for anything and now he tell me its my fault

Why is upset with me?
Post Opinion