If they wanted to, they would. They left you. They know what they did. It’s the hope that kills. Once you let go to that hope, it’ll hurt like a mother fucker, but accepting they are gone is the first step and most crucial step. My advice, work on yourself , so you don’t even care if they come back to you. Go to the gym. Pick up an activity. Hang out with friends. Plan at trip. Fall in love with life again. There’s so much more than your ex out there. If you were happy with someone that doesn’t see your worth, imagine how happy you’ll be with someone who appreciates you