How do I get over someone I love?

So ladies, me and my ex have been broken up for nearly 2 years. We moved into a house together which me and my children are currently living in. The question is, how do I get over him? I’m still majorly inlove with him and I can’t stand the thought of him with someone new (we both haven’t found anyone else yet). It breaks my heart every single day. I hate being at home because it was our home and it feels empty without him here. It’s just a house. The thought of me moving on makes me sick, and the thought of him moving on makes me sick. Because I still want a future with him. I want to grow old with him. I just don’t know what to do anymore :cry: