Hey! I didn't see your previous post but I've been in a very similar situation. I made a few selfish mistakes a few years ago, and it costed me a lot of friends. Yes, they talked a lot of crap about me, both behind my back and to my face. The guilt ate me up inside for weeks, and lingered for months.
Now, skip forward present day, and none of it even scratches the surface of bothering me anymore. I've made new friends, and I'm even closer now than I was before with some of those old ones. Most importantly, I've learned a lot about myself, and I've become somebody I'm proud of rather than ashamed of. So, my best advice is this:
-You already saw where you went wrong, and you feel guilty about it. That's good! It means you have empathy. You're just also human, and as a human, you're bound to make mistakes here and there. What matters now is just learning from it. Learn why you did it, and what things you can do moving forward to not do it again.
-As for people talking bad about you, they have every right to. If you haven't apologized, then you should if you're able to. If you did apologize, or when/if you do, and if they don't/haven't forgive(n) you...then it's okay. Nobody owes you their forgiveness except for one person. That person is yourself. I promise it will all be okay as long as you forgive yourself.
I know this is really hard, and it might take some time, but I mean it. Forgive yourself. You did something dumb, and everyone does at some point in their life. It too will pass as long as you let it. Don't let it eat you inside forever. The only true way to move on is to first forgive yourself.
-Once you learn to forgive yourself, the rest starts to become easier. You're able to give yourself more grace and kindness. I know there's that little voice inside of you telling you that you don't deserve any kindness anymore, but don't listen to it. You do.
We can't change the past, but do not let your past, do not let that situation--which is only about 0.002% of your entire life--define the rest of your life. You will meet new people. Maybe in time some of the people you once were friends with you'll click with again. Whatever the case, I promise that this doesn't define who you are entirely. No matter what they say. It will only make you stronger. You will grow so much from this. You will look back at this with so much love for your younger self. You are learning. You are experiencing life. That is all it is. You can get through this. Just be gentle with yourself.
At the end of the day, whoever still hates you and whoever loves you doesn't matter if you don't show up for you. Keep going. ð©·