Breaking up with someone who doesn't want the relationship to end can be extremely difficult, but it's important to be honest and compassionate in your communication. Here's a suggestion for what you could say:
"I want you to know that this decision hasn't been easy for me, and I understand that it's tough for you too. I care about you deeply, but after much thought and reflection, I believe that ending our relationship is the best decision for both of us.
I want to be honest with you and acknowledge that the feelings we have for each other are real, but sometimes, love alone isn't enough to make a relationship work. We have been through some wonderful moments together, but we have also faced challenges that have made us realize we may not be as compatible as we once thought.
I truly appreciate the time we've spent together and the memories we've created. You deserve to be with someone who can give you the love and happiness you deserve, and I need to take time to focus on myself and my own personal growth.
Please know that I'm doing this out of respect and care for both of us. I don't want to hold either of us back from finding the happiness we deserve. I hope we can part ways amicably and remember the good times we shared.
I understand if you need time and space to process this. I hope we can remain friends in the future, but I also understand if that's not possible right now. Take the time you need, and if you ever want to talk or share your feelings, I'm here to listen.
Thank you for understanding and for being a significant part of my life. You will always hold a special place in my heart."
Remember that breaking up is never easy, and there may be a range of emotions from both sides. Be prepared to give them the space they need and allow yourself time to heal as well. It's essential to prioritize your well-being while showing empathy and kindness to the other person.