Feeling Abandoned

So my bf is in Bootcamp we have been together for a year now and when we are together there's no doubt in my mind that I love him but now that he's away I feel "weird" for lack of better words I still love him but idk something feels different now. I think it stems from feeling abandoned and left behind. Don't get me wrong im so happy my bf Is doing this I support him a 100% I get its a growing experience but at the same time I can't help the way I feel ? Is this normal can any of you who have gone through this with ur SO give me advice I would really appreciate it