I think it is showing that putting down your thoughts on a subject, and exposing them all to the scrutiny of gransnetters, can be a very effective way of helping you to gather your thoughts and clear your mind. Talking it through without having to pay a therapist, for a start. Meander away, tcherry!
I would say, maybe you need a bit of time together away from your normal everyday life. Time to see if you still have anything left in common and still have any feelings left for each other. A normal fortnight's holiday is not sufficient.
When DBH breaks up, for the first week it's fine. For the second, we are getting on each other's nerves. By the third, we have settled into some sort of routine. He is no longer getting up at 6am and going to bed at 9pm and expecting me to do the same, I am no longer being irked by him rearranging the dishwasher for greater efficiency (I arrange and wash according to when I know I will have time to do it) and forgetting to put his washing out. Every year sees a renegotiation of household duties. It's all very good practice for when he eventually retires, but I do admit that when he does, I shall miss daft things like having cake for lunch, getting dressed late after having wandered around the garden in my pyjamas, and shall resent the amount of coffee and milk he will get through.