You should confront your boyfriend for you to know all the answers behind your questions. There are two possible answers to your speculations. One, he might be not that inloved with you and he is still open for another relationship to the fact that he is still active on the said online dating sites. If he was really inlove on you then he should be contented and no longer participating on this kind of site. Second, he must doing this just for fun and don’ have any intention of meeting them personally. He might consider it as a past time.