Moving to the other side of the world

So today I leave my family to move to the other side of the world (just for one year) to be with my long distance boyfriend. I’m excited, but I feel guilty leaving my parents and my dogs and I am a bit sad. I know this is probably a normal feeling but it would be helpful to just get some advice on how to cope. It’ll be over a day of travelling where I’ll be by myself with a lot of time to think and I just don’t want to be sad.