Most Helpful Guy
Breaking up always hurts, unfortunately, so there's no getting away from that, sorry! Hmm... write to him, and let him know that you're not interested in him anymore, or have found someone else, or are going in a different direction to him, or aren't compatible. Whichever is most true. It's not easy, and I respect that you don't want to hurt him. But you've just got to be a bit selfish, and know that you're doing this for you, and you'll hurt him more if you're not honest and straight up with him. Good luck!
Most Helpful Girl
Why not do a Skype call? I know it seems easier on YOU to do it just over text or something but it doesn't make it easier on them as they may have questions and then a phone call will be better for them to understand and feel free to ask questions. Ask yourself what you would appreciate hearing if someone was breaking up with you.