I don't like the sound of it already: He'll probably do the office thing..........he's great with finances.
In other words...........you'll still be doing the hard stuff and sweatin' bullets to earn enough to keep both of you afloat.
There have been many on this forum that have gone into partnerships (might as well be a marriage) and it didn't work out..........I'm one of those people. Had my ex-partner and I thought alike, spent alike, worked alike, ate alike, slept alike........well.............get the picture? I'll put it like this, if you could be marred to this person then you could be partners, if not then re-think this thing. My partner is my wife, she helps me with several aspects of the business and even that has taken time to smooth out.
I would imagine like most people (myself included) that you will try it anyway..........if and when you do please let us know how it works for you. We're not always right and it might be the best thing you ever did!