How do you stay aggressive and persistent while keeping space?
If, to you, aggressive means being straightforward (which means more than just being vocal) about your expectations
and
persistent means expressing and sticking to those expectations through your actions (i.e. finishing how you start),
then
maintaining space is not very hard. Actually, space will be unrelated to those two concepts. It will derive itself from simply filling your time up with doing the things you love to do.
However,
if, to you, aggressive means needy (do some push-ups)
and
persistent means you are unable to take a hint (lack of observation skills, lying to yourself),
then
yes, your "persistance" (impatience) and "aggression" (neediness) will infringe upon the space between you and the woman.