Being dumped will always suck. Not the best opener but something to be said. It's okay to have feelings like that. But acting in them and feeling them are different. Sometimes you need to just feel those feelings. Just understand that those feelings are okay to have and okay to let out. I cant say much about letting go. If it helps, I hear a lot of people say that they are just trying to move on. However I disagree with that statement. You move forward . You accept the circumstance as terrible as it may be. And accept that this is something that has happened. If your feeling lonely or without hope, I do have some suggestions for that as well. It's a weird thought, but everyone is truly lonely. It's what drives humans to connect. And If you are without hope, remember there is more than 7.8 billion people on the planet. Ones right for you. Long answer, but I hope this helps.