I'm certain God didn't give you this disease unless your boyfriend is God, which isn't likely. I'm also certain everyone would agree you certainly have a valid reason to be depressed. What happened to you was the fault of your unfaithful boyfriend, who obviously didn't deserve your loyalty. It's completely on him and what he did was truly selfish, thoughtless and he clearly thinks more of himself than is necessary. Some posted good advice was to get some professional help or therapy to help you through this and to allow time for you to get your perspective back. What he did can make you feel bad and worthless, but only if you let it. What he did was about his lack of self-control and not about you.