You see - this is the way of a self-absorbed, self-centered
behavior your man is exhibiting. When you go out, he would sms
every 5 minutes, etc - this is BECAUSE under this self-absorbed
character lies a gnawing inferiority. 
Oh you want space, yet you don't give space theory. (E.g. I can
club, you cannot club. I can go out with girls, you cannot go out
with guys.) Sound familiar people? Yes, indeed it is. I am sure a
couple of friends whom you know falls under this category.

I told you in my prior post - he knows you are needy of him and
this is a way of his 'security'. Subconsciously, it has became
he-can-dump-you-and-you-are-powerless-against-him kind of thought.
Love is about looking at the same direction - not dominating it.

Advice?
Exactly in my prior post. There is something I would like to add on
- do what he does. If he go out with friend, don't bother to msg,
etc - same for you. Whatever reasons he used to defend himself
(aiya, forget mah, I am playing lar, etc), do the same. Shaken this
fortress of his and let him know that the there is no king in
relationship - only two commoners moving forward. 
P.S: A leo lady - I feel that there is a lack of self-confidence
outside him. Build it up - its your most important resource in
life. Afterall, if previously what you have done is futile, you
could try what I had mentioned. 
Cheers