Once that trust is broken, it well never be the same again. Because of the lies he may not believe anything you say no matter what it is. It might be time to just let go and learn and grow from this. Break ups are probably the most pain people ever go through, but at the end, when it’s all over and you’re moving on, you come back ten times stronger. You won’t always feel like this. I promise, I’m going through a similar situation. Believe me, there is hope. But don’t let that stop you from moving on and finding yourself. Focus on your own happiness and how you can improve. You shouldn’t let past relationships hinder your present & future ones. If he forgives you and has the strength to try again, he’ll find you.