Hi pear.... As a man I can tell you that he is probably feeling that you're not as attracted to him as you used to be. You say that he never initiates sex. He is probably feeling unattractive and unloved. If you really do want to continue in your relationship, I think you should talk it out with him and tell him that you are going through a stage that is more to do with you than with him. And tell him you would like him to initiate sex more often... It will make him feel more attractive and may have a good effect on your future relationship.