How to end a relationship… Personally when I break up with mine a couple of years ago, I regret not giving her the proper closure. I came up with a few rules on afterwards on how I would deal with it. We are good friends now, maybe still missing the romantic days together, but I do feel better about it.
Always do it in person. Never do it on a phone, not by text, don’t leave a message or drop a letter. Don’t even try to hint that the relationship is dying and maybe we should do something about it. Just don’t. Confront him/her straight on. Do pick the right time and place, however. You don’t want to do it before he/she went to work where you won’t have enough time to discuss it properly. Maybe on a Friday or Saturday night where you both are more relaxed and rested and she/he had time to recover through the weekends. You don’t want to break up in your favourite hangouts either, bad move, it would just make it so much worse for the both of you. Do it in a place with no special meaning. Somewhere private is recommended.
After the break-up, expect the bad reaction, comfort her/him as you can, even if he/she's starts yelling, keep calm. Make it easier for her/him. Be compassionate and firm. Remember, your decision, is mature and civil about handling it. If you are worried about leaving her/him alone, get a relative or friends to let them know and help him/her get through with it. Try to keep it as private as possible, however, you don’t want the whole world knowing. Give him/her all the tools they need to calm down, still be there for him/her in this period. Time is your best friend. When you start feeling like your old self again, it’s time to enjoy your life as a single again.