I can somewhat relate. I am supposed to go to my house today to pack everything up. I could be leaving as early as monday (IF they were to give me the visa that day which I really doubt) and my ex is moving with my son friday. My parents are very unsupportive of me moving. My entire family is really. I know it will be even harder waiting once my son has moved.. I will be feeling completely alone.
I would also say talk to your bf...I have a hard time opening up and saying how I am feeling, but I learned from my past mistakes that communication is really important.
I have noticed when we are about to see each other my fiance and I argue more. We both get tense and tired of the separation and frustrated because its so close to being over. This whole visa process is realy stressful tooand its hard to stay cheerful. Thats when its really the time you want to talk to each other.
Sorry I really meant for my post to be more cheery, Im just very tired at this point and know I have things I have to do and just want to crawl back into bed.
Just know youre definitely NOT alone, you have all of us

We know what youre going through, there are a lof of us going through it now, a lot that have been there and done that...and there are those just beginning on their journey.
I agree with what sonya said, he could be worried about how you might like it over there, if you will make the transition easily or not etc...just be open with him and let him know you wouldnt be making the move if you werent ready.
Good luck to you, Im sure everything will be fine

Katrina