Well, it was inconvenient for him more, wasn't it?
He gains: no commute issue (bet it was you travelling to him more anyway, cos of him having a house) and financially gains by having his bills reduced
He loses: nothing
You gain: no commute
You lose: your job, your cheap digs...
I bet you did more of the commuting, and at more cost, too. Just a hunch.
Look, he might be lovely, and this might all be a misunderstanding. In which case, it's easily cleared up:
Just tell him. You want to pay proportionally on essentials and have a clear agreement on extras. My ex and I had very different attitudes to money, but it was OK cos I was independent, and reasonably well off as a couple. So when he wanted steak AGAIN, I didn't resent it.
Actually - we had a shared account for fixed bills, but shopping it was "who ever does the shop pays the bill". So if he shopped there might be steak, if I shopped there'd only be steak if it had a reduced sticker! But it worked OK for us. (ex for other reasons!)
There'll be exceptions, but 9 months is no time to know if it will work out. So forget my comments about joint mortgage.
But he shouldn't make a "profit" from you, when you've moved for him, chucked in your job for him, and have loans to pay.
Forget kids for now - give your relationship the test of time first.
Propose a proportional split, and if he has ANY issue with that, you know he's not a man that will make you happy.