I think my boyfriend is gonna break up with me, would you agree?

He is having to go to Sweden to work and this was known from the beginning of when we started dating, he just didn't know how long it was going to be. He's told me that he's worried about it, that he is going to miss me, how difficult it will be for us and I've reassured him as best as I can but he is insecure. So today he found out how long it could actually be, first it was only 2mths, then 3mths and now its between 6mths and 12mths. He's asked me what think and I was honest, I will miss him alot but I cant t tell him not to go we've only been together for 6mths and I wouldn't want to do that to him anyway. I said it will be difficult but as long as we take it one step at a time and try to make it work. He doesn't go until the end of this month so obviously trying to make more time for eachother now, I'm meeting him tomorrow which was meant to be for a lunch and a movie, he has now changed it to coffee. I'm now thinking that hes just gonna give up and not even try just get out quickly before it gets difficult. Now am I over thinking it or does it actually sound like I'm going to be getting dumped tomorrow?