How do I handle the weight of past haram mistakes?

Assalamualaikum, hope you’re all doing well, insha’Allah. I’ve been in two haram relationships, the last one ended a few months back when I chose to leave. Every day, I carry this heavy guilt about what I did. My family and I are religious, and I was raised with good values, but I still let my desires take over and rushed into things that had no barakah or real benefit for my life. My parents don’t know, but my brother does, and he’s been guiding me through the tough moments. I’m truly so ashamed of myself. I’d convince myself it was for marriage, for the future, but we all know haram is haram, and it never lasts. I’m slowly trying to rebuild my connection with Allah, become a more devoted Muslim, and stop obsessing over the "what ifs" about my past. But my question is-what do you actually do with the aftermath? Like, when it comes to marriage, do you tell that person about your past? What if they judge you or it causes problems? Do you just act like it never happened, or keep it between you and Allah, buried in your heart? Honestly, I’m overthinking every possible consequence right now. I feel awful for letting myself fall into those situations, and even though I ended both and promised myself to stay away, I lie awake at night worrying about my future. Any advice or wisdom would mean a lot 🤍