The emails and phone records up to now will be useful. I highly recommend collecting other evidence as you go along. It'll be a lot easier than trying to piece it together all at once in a year.
My spouse and I are not 'photo happy' people either. We always made absolutely sure to take a couple photos each visit, but they were really silly. Many of the photos were myspace angle shots of the two of us standing in some store while we were out doing errands, for example, and we only included about 20 total. Now that we've been living together for a couple weeks, we've completely stopped taking pictures again.
Over the course of a year, you'll probably celebrate at least a couple holidays. These will be a good opportunity for taking pictures, especially if you celebrate anything with family. There's always at least one aunt who takes 1000 pictures of everyone, you know?
You'll also want to keep copies of things like:
Joint leases
Mail addressed to one/both of you at the same address, to help prove cohabitation
Joint bank accounts
Cards you've send each other (if applicable)
Phone/skype records (collect these as you go along, some people have reported trouble accessing really old records)
Insurance paperwork (for example, if you're named as his beneficiary on his life insurance)
More unusual things people have used:
Pet adoption paperwork showing both partners
Portraits that one partner drew of the other
Screenshots showing both partners playing video games together
Screenshots of Facebook updates showing development of the relationship
Etc
Even if you don't have a ton of photos, the application is considered as a whole, not on the strength of pictures alone.