Exactly. This kind of situation is the last thing he needs: Cameron is both unable to give what he needs and unwilling to receive what he brings to the relationship, and the end result is his being pushed farther down the road that left House so damaged.

I agree that Cameron's pathological desire to 'fix' was probably behind her continuing their relationship beyond the 'microwave pizza' stage: note that she rebuffed Chase's attempts to reconcile for weeks, then showed up on his doorstep after House had fired him and left him at an emotional low. (Coincidence? I think not: what attracts her is pain.)