I really have a dream of being a runner, and maybe, just maybe, a fitness model. My boyfriend says I don't need to run, don't need to lose weight, etc. the thing is, I want to do it for me.

The only problem is I want to do it even more now that he has his habits that I cannot stand. He knows how much I dislike his unhealthy habits, and doesn't care to change. So I figure, why can't I do what I want?

Is this a bad way to go about things? I'm not doing it for revenge per se, I just figure if he doesn't care what I think, why should I.