Long distance relationship? have you done it?

My boyfriend recently went on vacation and he wants to move to where he vacationed at. It'll go from seeing him a lot to only FaceTime and texts I have no problem with it but this would be hard to adjust to on my part and he finds no problem with it? Lol he's making me out to be as if I'm "selfish" and I will "cheat" on him because "I said I'm not sure how it'll work out on my end and it's something I'm not used to but I'll support your decision 100% and we'll see how it goes from there".Has anyone been in a long distance relationship? How was your experience? Tips?