"I have completely broken down and embarrassed myself with him, literally begging for him to come home.. And when I stop, around he comes telling me he has feelings for me and I'm back where I started."
'Back where you started' is where he wants you
. He wants you to want him, it strokes his ego and makes him feel powerful; and he'll say "he still loves me but he wouldn't get back with me and he always flirts and makes comments' to keep you - back where you started. It's deliberate. It's cruel. It's a total mindfuck.
"I've asked him to stop as quite honestly, this breaks my heart and confuses me."
He wants to confuse you. It makes it easier to manipulate you and upset you. He enjoys upsetting you, it proves he has power over you, and that's all that matters to this arsewipe.
"Why would you be with another woman if you're telling me you love and care for me?"
Because he doesn't mean it. It's all just part of his toying with you, to feel powerful.
'What I need is advice on how to stop being so upset, angry and to stop thinking about him 24/7."
Look at what you said - "I loved every bone in his body and I still do (god knows why!)" What is there about him that is loveable? Serious question. Put it into words - for yourself, not for me. Write them down. Can you? Is there anything that you can point at and say - 'that's why I love him'? It can't be how he treats you. It can't be his kindness. It can't be his respectfulness. So what is it? Write it down. Is there anything on that piece of paper in front of you? Any words at all, or just an undefined vague longing for him?
I'd suggest that your 'love for him' is no such thing. It's a longing for the person you thought he was, the person you thought he'd be with you, the person that he isn't, never was and never can be. You're in love with an idea of him, not him. You need to separate them in your mind, him and your idea of him. They're not the same, not the same at all. Have regrets for the person he made you imagine, but keep reminding yourself that this person in front of you, saying these things to you to keep you unbalanced, is not the person you long for. That person is an illusion who looks just like this arsewipe in front of you.