As Pearlgem suggested, I would give him the benefit of the doubt for now. People do get busy, and there are often reasons why they fall out of the loop when traveling.
However, upon his return I would make your feelings on this very clear. Yes, the relationship is new, but if you're both using the "L" word and he is claiming ownership of you, new or not, there is a reasonably assumed and supposedly mature level of commitment here. J is currently out of town, and if he just dropped off the face of the Earth for his entire week long trip I have to say not only would I be a little annoyed I would be legitimately worried for his safety.
Simply, a discussion needs to happen sooner rather than later between the two of you as to what depth of commitment and involvement each one of you is interested in. It's all fine and good to "block" you from saying goodbye and verbally pull you back, but you need to make sure that what he wants you for and is pulling you back for is also what you wish to be desired for. If he wants a couple submissives or if he is deciding between a few options and doesn't want to get dumped while he picks, that's more than enough reason for him to pull you back, but probably NOT good reasons for you personally to stick around.
Long story short, talk about this and set some ground rules for you both to follow.