Based on what it sounds like, there would be no monetary implications, no VCs to impress, no legal considerations, right? This may sound callous, but there is r

Based on what it sounds like, there would be no monetary implications, no VCs to impress, no legal considerations, right? This may sound callous, but there is really no reason why you should waste time even thinking about titles when you are a two-person shop operating a bunch of websites. Just let it go. On the other hand, if you already started to divide your stuff into "his idea" and "my idea", this might be an early warning sign that something is in the process of going wrong, if you previously worked together as a seamless team.