My suggestion would be to get the financial stuff in writing, and notarized. That way, if the relationship blows up, everything's legal and he has no recourse. You *definitely* need to spell out who's responsible for what as far as bills and stuff, and what he owes you if he decides to move out, or, god forbid, if he dumps you for getting pregnant (something many of us here have been through).
It's not fun stuff to think about when you're "in love," but it will save you endless grief in the end.
You might also spell out things like cleaning and maintenance chores, another hard-learned tip.
Make him do something or chances are, he won't!
Also consider what happens if one of you becomes seriously ill, handicapped or otherwise incapacitated. If you want him to be your medical power of attorney, for example, you need to make that legal now.