Most women seem to love text messaging and phone calls every day with the person they are interested in.
You have obviously not yet met many of the women of this site (and most of them aren't even SP!)
I think even amongst SPs, the "e" or "i" function would make a big difference as far as needs for space. ISFPs are the protypical 'march to their own drummers". I think I knew an ISFP guy once and it was actually kinda fascinating trying to understand what his actual perceptions and boundaries were -- when I was being invasive and when he wanted..contact? (This isn't even in a romantic context, btw)
Even with my INTP friends, I often wonder if their stoic or gruff response to me is rebuffing me or telling me to back off or is actually the opposite, showing me they are in distress and want or even expect me reach out. I kinda wonder about their boundaries and space issues. It's harder with NTs or people who are not as...expressive or verbal, at least for me. I get all hyperactive with my Ne and try to anticipate reactions and needs and 'meanings' when my friends are in distress. Maybe it's easier for INFPs.
It's the classic quandary when you see an acquintance cry. How to respond? Do they want you to ignore them (I'm serious, I've often wished people would ignore me when I cry in public, b/c it's embarassing!) and give them a lot of space? Do they want you to reach out and hug them literally or figuratively?
BTW, I think your question about space when it comes to courtship can unfortunately lead to HEAD GAMES and second guessing what someone 'really means' or trying to send 'signals' to what you want. Yikes.