calculus analogies

you know how sometimes you get anxious and sad when you think that you've reached that point in a relationship (any, not just boy-girly) where you're just stuck at a roadblock? where maybe you're as close to that person as you ever will be, and have affected that person's life (for the better) as much as you ever will? and worried that since you're at the max point already (think slope equals zero) that any further emotional vestment in the situation will end up being a bad idea in the end? but at the same time, afraid to be over cynical and ruin what could have been even greater (local max as opposed to the absolute max)?

i feel like that.