That's true that a lot more fast food places are getting healthier menu options, but you do need to watch the calorie count on them. A certain "zalad" I was eating a lot had like, 800 calories in it!!
I ranted a few weeks ago about a new McDonald's commercial. Those new cherry berry chillers (or whatever they're called) have almost 100 grams of carbs. If I hadn't looked that up out of curiosity, I would have never guessed there were that many in it (I don't ever eat at McDonald's anyways so it wouldn't have really mattered). My work food weakness is the Dunkin' Donuts. Thankfully, we don't have them here a lot and when we do, I *mostly* manage to limit myself to ONE blueberry cake donut!
Good for you at choosing healthy! Don't be afraid to be different and be your own health advocate. You might feel alone now, but think how your coworkers will feel when they are home alone every day because of a debilitating disability brought on by their junk food habits. They'll be wishing they had been more like you!
Don't think of it as being "alone" or "isolated", think of it as setting a good example. Whether they follow it or not is up to them. I'd join you for a healthy lunch if I could!
Keep on keeping on!