You do realise you don't 'need an excuse' to break up with him?
He goes out at 8am and comes home then goes the gym till 9/10 every night whilst im trying to juggle DD, a job and a masters degree
Have you discussed his lack of parenting/input with him?
Just because he looks after his own dd one day a week doesn't make him a good dad.
Him coming back from gym early so you can go to work is not something 'special' .....looking after his own child is NOT 'doing you a favour'.
A GOOD dad would be spending time with his dd or helping out around the house etc instead of buggering off to the gym all evening every day.
The reason Im still having 'sex' with him is because we live together, have done for 9 years and have a beautiful daughter. is that good enough for you?
Errrr.....no.
That is NO reason to continue having sex/unprotected sex with someone!
Especially when that someone is selfish and doesn't make you feel wanted or loved.
You also say he is so physically and emotionally distant from me.....yet you continue to have sex 
You have every right to feel hurt and angry at him - but you can't blame 'pregnancy hormones' for your situation. That's just a cop out.
I suggest you own your mistakes and move back to your mums until you sort out your housing situation.
Staying/continuing having sex with him just so you don't have to stand on your own two feet/avoid things is ridiculous.
Find your self respect and stop shagging a guy who blatantly treats you like shit and who you suspect is cheating on you.