How do you leave a cheater you still love without losing yourself?

I know I need to leave him but I love him and can’t imagine the months moving forward without him. He tells me he loves me but I don’t know if he actually does. I’ve caught him stalking other women for months and it breaks me. Makes me feel like I’m not good enough I don't know how to end it without feeling like I’m losing someone so important to me but bad for me
How do you leave a cheater you still love without losing yourself?
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