Life tips to getting over a break up.

Hey yall. As you can guess by the title I am going through a breakup. Tomorrow will make 3 weeks since we've broken up and it's still hard and it still hurts. We broke up 2 days before our 1 year and 7 months. The pain still feels like yesterday. I was and still am in love with him but I know he is not with me as he cheated on me. Don't get me wrong, it's got easier in ways. I don't cry nearly as much, I've still always been able to get up and shower, brush my teeth and hair, but I stopped eating and drinking... which recently I have been able to start eating again. I've lost at least 15 lbs in these past 3 weeks, I haven't wanted to check the scale lately. He said we'd meet Sunday to give our stuff back to each other and to talk about things. I have so many questions, so many thoughts but I'm not sure what all I want to say. Any tips on how to get through this and what I should say/ask Sunday would be appreciated. Much love to you all.