It's important to approach the situation with empathy and understanding, as breaking up can be a difficult and emotional process for both parties involved. While you cannot force someone to accept a breakup, you can communicate your feelings and reasons for wanting to end the relationship. Here are some arguments you might consider using:
Honesty about your feelings: Explain that you have given this decision careful thought and consideration. Emphasize that your feelings for him have changed, and you believe it's essential to be honest about your emotions.
Respect for yourself and him: Mention that it's essential to respect your own feelings and emotions, as well as his. Continuing a relationship that you no longer feel invested in wouldn't be fair to either of you.
Lack of compatibility: If there are specific reasons why you feel the relationship isn't working, you can discuss those. It could be differences in values, goals, or lifestyles that make you believe you're not well-matched in the long run.
Individual growth: Explain that sometimes, people grow and change over time, and that might lead them in different directions. You can mention that this is a normal part of life and doesn't diminish the positive aspects of the time you spent together.
Mutual happiness: A healthy relationship should ideally bring happiness and fulfillment to both partners. If you feel that you're not happy or not able to contribute to his happiness, it might be best to move on.
Respect his feelings: Acknowledge that you understand he may be hurt and upset by the breakup. Assure him that you don't wish to cause him pain but that you believe it's best for both of you in the long term.
Autonomy in relationships: Remind him that every individual has the right to decide what is best for their own life and future. You can explain that you are making this decision in the interest of your well-being and happiness.
Ultimately, while you can share your reasoning, remember that you cannot control how he feels or responds to the breakup. It's crucial to approach the conversation with kindness and empathy, listening to his perspective while being firm about your decision. It may take time for him to come to terms with the breakup, and he may need space to process his emotions. Give both of you the opportunity to heal and move forward separately.