Self

I'll say up front that I haven't read through the thread, but I am in the exact same predicament as the OP, except we've been together for almost ten years, not five.

What I've done up to this point is reconfigure what I find attractive. I would prefer she lose weight, but I've been fairly successful at programming myself to find heavier women attractive, even to the point where I find myself giving hot, skinny chicks dirty looks, like, "ugh, way too skinny."

I've moved from being a breasts man to being an ass man; and just in general my taste in women's bodies has dramatically shifted toward "thick." A women that weighs less than 140 pounds just doesn't do it for me anymore (unless she's 5-6 or shorter).

Point being, I suppose, is that it is possible to control and manipulate what you find physically appealing. I'd still prefer if my gf lost weight (some 20-30 pounds would be nice), but I don't find her repulsive in the least - I've literally cultivated a preference for heavy girls that I never had before.