i more or less sent this;
I’m sorry I haven’t been texting you back. I’ve just been really overwhelmed, and while you have been away, I realized that what we’re doing isn’t what I want anymore. You once asked me to be honest with you and to leave if I didn’t see us being together in the long term. I think I made that choice in my heart some time ago, but I’ve only just started to believe it.
I know this is painful sweetie, I regret hurting you as much as I have, I’ve only ever wanted to bring you joy. We've tried to make us work, but we're stuck in a cycle that isn't good for either of us. This isn't about giving up, it's about us realizing that we aren't moving forward. I want the best for you, and I hope this gives both of us a real chance to heal. I believe you will find what you need one day and that you can find people in your life to bring you real happiness, even if I can’t be that person for you anymore.