I agree with the others here, it seems I can't go 10 minutes without mentioning my wife in some way during a conversation, without even going out of my way to do so. Details like the fact that you're seriously dating someone else should be in one of your first conversations with someone being considered romantically. If you have an online profile, it should be one of the most prominent details. If you send someone an online message, it should be repeated in the first message. If you ask someone out in person, they should know before they see you at that first date that you're seriously seeing someone else. If that's not something they're already ok with, no one's time should be wasted and the date should never happen.
It sounds like your BF is treating your relationship as out of sight, out of mind, essentially behaving as if he were single until he can be with you in person.