Firstly, don't jump the gun. This might well not go anywhere. And you're not to look pleased if it doesn't. Don't let your imagination run away with you.
Secondly, if this is the love of your life, and this is his lifelong dream, and he's finally getting somewhere with it, then you need to stop being selfish about it. 2 months really isn't a lot of time for a couple in a serious relationship to spend apart, if you don't think it'll last then why are you with him?
To genuinely support him you have to want to be there for him throughout all of this, and to me it doesn't sound like you want to if it involves a lot of effort. If he hits the big time he'll need you there as a companion and to keep him grounded. And less of the insecurity - why would he want to get off with random groupies if he has you, who he presumably loves and who actually knows him?