Long distance relationship advice

In a few days i’m going to be temporarily moving 6 hours away from my fiancé. I don’t know exactly how long i’ll be there but it’ll be at least a few months.

My fear is that we’ll grow apart or he’ll meet someone else. He reassures me that he won’t and that he loves me and we’ll be okay, but I’m still scared. I trust him and I know he wouldn’t intentionally do anything to hurt our relationship.

We’re with each other ALL the time. I don’t know how things will play out and that scares me.

So, if any of you guys have any advise on long distance relationships, please PLEASE share!!