It sounds like your in a tricky situation bbw_claire.
Perhaps you should phone him up and tell him you want to get the next plane out to see him and support him and see what he says. If he just mildly tries to put you off then you know he really wants u but if he is adament that its not right for u to go then u have to respect that decision. At the moment you need to judge what your BF needs, its not really about you at the moment as I can imagine he must be going through an awful time.
I'd say if he realy doesn't seem keen on you visiting, you should stay and prove to him how much your life together means to you by going out and getting a job, or at least securing more interviews. I know its probably a difficult time for you too but you should think about how nice it would be when he comes home, for you to be closer to getting a job and showing how much he means to you.
Good luck
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