I'm really lucky with my BF too... he's so supportive of me on this woe. We went away for a couple of months travelling, and staying on plan was the hardest thing to manage while backpacking (my pack of LC tortillas and a stash of canned tuna just about pulled me through!), but he was so sweet about putting up with trailing around different places when we were looking for someplace to eat to find somewhere LC-friendly. He's not on low carb, and I do sometimes get a bit tetchy when he brings home a massive pizza (my old weakness!) but that's my problem not his really, and he doesn't try to get me to have any or anything (unlike my mother... but that's a whole different story!!)