Right mate. I'm new here but I've been through what you've been through. Lying, anger and loss. It's f*cking horrible. The thing is, however much you hurt right now, you've hurt somebody else for longer. So you have to let her have her say on things and sit there and take it. It's a foul tasting medicine but it's good for the soul (eventually). Once you've heard it a couple or three dozen times. Then stop. You've run your course. Now the time is to focus on other things.

You say you're maybe moving in with your mum. Good. Do it. There's probably some element of that relationship that needs rebuilding too. Start there. The ex will either be there or she won't at the end of it. You roll the dice you take your chances. There are always other women. Other people to fall for. Your mum won't always be here. Trust me. I effectively lost mine 6years before she actually died so there are more important things in life than the ex. If she truely cares she'll see the effort you're making in life and might rekindle things. If not, you're a better person for you and someone else even better will reap the benefits. It might be tough but it will be worth it. Just don't f*ck up again as it is super hard to deal with it a second time.....again. trust me!

I don't intend on making this mistake again.

That's great news. Focus on the things you can achieve and correct. Everything else will take care of itself. This loss will help you open your eyes to what you want.