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He has left you already.
I know it sounds hard, i guess he still lives there and you go through the motions of everyday life, but he has left you already in his heart.
Doesnt that make you mad, he is choosing his career over you, he is using you as accomidation and support whilst he plots how he will leave you - for ever.
So make it your move not his, give yourself the power to make this deciosn, say enough is enough - get out of my house and get oput of my life, then go about putting the pieces back together for you and your daughter. It may be tough but at least You left him not he left you.
And Strangly this might be the only way you can keep this person who you obviously still love (i dont guarentee it though)beacuse then HE will be put in the position to make a choice if thats what he wants to be out of your life, not as theory but as fact.
I dont think he will stay though i think he is too much of a coward to end this the right way - I think he wants you to leave him.