It's tricky. You're right in that you shouldn't owe anyone an explanation because it is your money and your right, however, at the same time, when you invite people into your financial situation, it gives them an eye into your situation, which opens that door up. It was nice of you to not make your friend pay you back the concert ticket money, but when your friends and family declined repayment, I would have repayed them anyways, Then they have no right to judge when you go on vacation and post pics of it on FB. Perhaps posting the pics on Facebook caused some amount of resentment?