Although a short-term relationship does not require the same level of emotional commitment as a long-term one does, ending it can still be stressful. Feelings may be hurt even if you both agree it's time to move on. To minimize inflicting pain on your fling and yourself, focus on leaving the relationship without leaving any loose strings to tie up.
Be honest and direct with your partner. Confront him without being harsh and tell him that you no longer want to be involved in the relationship. Make a clean break, suggests Simon Oaks in “How to Break up with a Man” on YourTango. Your words may hurt him for a short period of time, but he will suffer less pain in the long run because of your honesty.
Don’t try to hide the fact that you want to end the relationship or try to make the event seem less painful by sending follow-up messages or texts. Don’t be ambiguous or simply tell her what she wants to hear. If you are not honest, she won’t fully understand that there is no relationship anymore. End the relationship in a businesslike and honest fashion and she will respect you for it.
Remove all forms of intimacy within the relationship to end it quickly. The illusion of continued intimacy will make the relationship more difficult to end, reports Stephen Mitchell Ph.D. in “Psychoanalysis and the Degradation of Romance.” Make it clear to him that there is no intimacy to be found from you and that he should seek the support he needs from others.
Resist Further Contact
You may be leaving your short-term relationship because it is not fulfilling your needs, you are looking for a long-term partner or you are simply bored. In any case, do not stay in contact with your ex. Doing so will extend the time it takes to get over the relationship and prevent you both from finding someone with whom you might be more compatible in the long term. In addition, on-again, off-again relationships tend to be tumultuous and ultimately lead to lower satisfaction.