You have to let go. You have to move. It's the only way of initiating the healing process and ensuring recovery so you can move on. When you keep on clinging to him, you're self-destructing yourself. You'll become depressed and develop low self-esteem. You'll not live your life, and you'll arrive at a point you'll decide to end your life.
Leave him at that place. Go and stay with your friend or family member for some time. It will assist you a lot in finding the strength to move on.
Listen to your tears. They're tears of pain, of wanting to move on but not heading their plea. It's a hard decision, but it's for your own best. Tell him you're moving out. Don't carry all the things. Carry the most important ones. Thank him for everything and wish him the best.
A few weeks before the lease ends, go with your friend or family member and take your things. By the time you return to take your things, you'll have already healed and moved on with your life.
When you move out, don't call or text him in any way. You should cease any form of contact. Only greetings and talk if necessity requires it, e.g., you work in the same place.