If you ever catch yourself hating at yourself for the things you have done in the past, regretting it. Don't beat yourself up, be proud of yourself. That means you're now a person that would not do such things, that's why you regret it in the first place. That means you're moving forward with yourself, embrace that.
I feel like I'm finally back to moving on again.
Long story short: she broke up with me before christmas, 4 months ago. She met someone new 2 weeks after, flirted right in front of me on group calls while gaming. I went no-contact 2 weeks after that started. Today marks 3 months of no-contact. A month ago she reached out to me if we can meet up so she can get her things back (i offered delivering her things before going no-contact but she said she's not ready and I can throw them out), so we did meet up, she brought her new guy. That kind of crushed me, had me spiraling and checking her socials etc. Month before she contacted me, she made a playlist with nostalgic love songs that I'm pretty sure were about me, she also made the playlist the same day after I deleted her everywhere. But it all doesn't matter as it's not a direct communication with me.
Now a month after the meetup, I'm finally feeling like I'm moving on again. Getting back to my hobbies, getting new ones, started eating better again (lost 10kg since the breakup, I now weigh 75kg). Made my own playlists that I enjoy, rather than listening to the "nostalgic" playlist she made. Stopped checking her socials altogether. I reached my goal of getting diamond 4 in League of Legends that I set myself after breaking up. I'm now getting myself ready to go back to the gym as well to regain my dream physique. I'm also about to finish my Master's Degree so that's something. Although finding a job in my field is NOT that easy.
So yes, it does get better with time. You just have to let yourself feel the feelings but not let it control you and bedrot. Wish me luck as I do for all of you here.