People may have a claim to your actions, but I believe no one has a claim to your thoughts or feelings. Perhaps you owe money for a service or good, but you aren’t obligated to feel guilty or worthless because you made a mistake or someone is suffering more than you. I believe it’s your right to feel happy or upbeat under the worst of circumstances, no matter how much society may frown on it. It’s probably practical not to express it, but you get to think and feel however you want to think and feel.
But then again, those are just my thoughts and feelings on the matter.