How can I pick up the pieces of my broken heart and move on?

I have no where to turn to because I can’t discuss this issue with anyone in my real life. So to make a long story short I met a guy at work. He eventually asked me out and everything was good for about a month. The problem was that the boss at work absolutely cannot stand this guy I’m dating. So when the boss finds out we’re dating he basically goes off (by the way no policy against the two us dating). The boss said that we need to stop dating .He separates us and punishes him by putting him on night shift. Now this isn’t the only issue. For starters I’m 21 and he is 38 with two children and an ex wife. I managed to look past all that and ended up falling hard for this guy. Now this guy that I apparently love is scared to move forward with our relationship because he fears being fired if me and him are caught together. I have tried so hard to get this guy out of my mind but nothing works. I’m so in love with him and unfortunitely he doesn’t return my feelings as deeply. He says that he likes me and cares for me but that we can’t be in a realtionship right now. Someone please help me, give me some advice because I’m stuck on this guy and it has me so emotionally distraught. I cry almost everyday because I can’t be with him. How can I move on from this? It’s hard not to think about him and when I try not to think about him I end up thinking about him even more. Help please, any advice would be very much appreciated. Thank you.