Some girls like the follower/submissive role where they overly rely on guys to make all the decisions; some girls would feel insulted to be dominated that way.  Whatever floats your boat but just know that if you accept the follower/submissive role, you forfeit the right to complain if he pushes you to change you in a certain way you don't want to be changed. 

If you really want to be his equal and someone who can see eye-to-eye with him, you should really learn to be your own personal trainer, nutritionist, therapist, and job coach. 

I think that as long as you feel comfortable, you should continue forward. If you think the pushing is too much, and that it should come from you and not him, then tell him.

Do whatever makes you happy. If you're not ready to leave your comfort zone then he should understand and respect you. If he cares about you, he'll help your through it. I agree with @xXDC_luyouXx because if suddenly one day he decides to pick up and leave, you're going to be left with all the broken pieces. It couldn't hurt to try to find your own independence and it helps when you have the support and encouragment of him being there. No one should have to tell someone what to do and no one should have to be told what to do.

Yes he is controlling you.   But you asked him to.

Pushing and pulling never works eventually your unconscious will kick in and perceive him as a threat that's when sneaking and resentment sneaks in but since you submitted this post you might already be there. My suggestion to you is set the tone or leave; there is no turning back because from this point he will feel rejected if you change direction.

You've been wanting to change. You wanted support to help you change. Your boyfriend is supportive. He's pushing you.

you need to talk to him and draw a line somewhere.  you're allowing him to control you.

i should clarify.  my major concern was not really whether he was being controlling, but rather whether he could still keep up that level of support without affecting the state of the relationship.  for example... if he helps me figure out a fitness plan, and i skip a day for no reason other than sheer laziness, i don't want it to lead to a fight affecting the whole relationship.  it hasn't happened at all, it's just a major concern. 

@xXDC_luyouXx - point taken.  but i've never been much of an independent spirit.  my personality is very malleable.  many things, particularly my artistic tastes, really depend on what kind of people are in my life.  it's not so much that i like being submissive.  i'm just indifferent to a LOT of things. 

@haloed@xanga - it's been mostly his choice.  it DOES stress him out, and i've told him time and time again that he doesn't have to invest himself as much.  but he seems to get something out of it, and i also think he realizes that a lot of the time, i can't really push myself.  he'd rather see me succeed than not, i guess.  i'm very thankful for that, and it means a lot to me that he'd want to risk really pissing me off to help me reach my goals.  so far, only my parents have managed to do that :p