My boyfriend has not been wanting ANY lately.. Recently he just doesn't want to have sex. He said it's not me, but I kinda feel like it's my fault? I know girls go through ups and downs, but I feel like that's more daily. This has been for a week or two. Am I doing something wrong? How do I help him? (We are still pretty young, so I'm more concerned it me or that he just doesn't find me sexually attractive)