why would my brain do this to me?

The past 4-5 weeks have been so good for me. I feel like I've been getting in control of my life again. I'm finally shaking off this episode of limerence and am hardly even attracted to my LO anymore. It's felt so freeing and stabilizing; I've fixed my sleep schedule finally, I'm exercising regularly again, I'm eating healthy again, and I've drastically cut back on alcohol. In moments of weakness and boredom I've even tried to entertain myself with his social media and just...nothing. I find myself still bored (actually finding some of his stuff kinda ick), move on in a couple minutes and don't even bother checking for another week or two. So why did I just have a hyper realistic dream of him messaging me: "There you are, found you! Come back to me." Why would my subconscious do this to me???? I woke up feeling a pang in my chest that I don't feel deserved to be there. Why is my own brain trying to sabotage the good I'm trying to do for 'us' (lol) ?!?!