When I'd get petty raises at work as a kid my grandpa would always tell me to tell them, "of course this is better than a stick in the eye, but my expenses are x, and my paycheck is y. I'm struggling to make ends meet here and though I'd love to stay I also need to do what is necessary to take are of my own business." I always ended up empty handed, respected, and finding a new job anyway. The only right answer is what ever you do keep your integrity in tact, a good reference is a good reference.