red8 - It really depends on the couple, but I think if you're planning to date a girl from another city/country, it shouldn't be hard at the start.

sales - I agree that everything depends on people, but I can tell you that in my case, it didn't work out, so it's better to be ready for that. You can just stay friends, and don't worry, there are many online dating services like https://datinger.uk/reviews/ourtime/ that can help you find someone else, and you can just stay friends.