I too love green beans and will eat them just about anyway. I've lost a lot of weight by eating canned beans, frozen beans, and beans fresh from my garden, (MY favorite, and I long for them again, but sadly my garden is buried in a foot of snow for now
)
Eating a can of green beans might not be the most optimal form, but I can tell you this FOR SURE, it is a **** of a lot better than a cookie, for the same calories.
Maybe you could try other ways for your fresh beans that you might like better than just boiled. My favorite way to eat fresh green beans is to stem them, (leave them whole), and stir fry them in a large skillet in olive oil and garlic (stirring often). Add a little water, salt & Pepper and soy sauce after they have sizzled for a good while and then turn down the heat and put a lid on it to steam them to the desired tenderness. Remove lid and up the heat to sizzle out any excess water and serve. I usually add sliced fresh mushrooms and onions to cook in with the green beans as well. It is to die for. I fix it for everyone, (kind of a company staple) and it always gets rave reviews...and NO leftovers.