Most Helpful Guy
Whenever someone says they want to change... then you have to put a time limit on it! Even if it is in your own mind.
Guys will sometimes use the "I will change card" to prolong the relationship while their intent is really never to change and just keep you around because it is better than being alone.
So always have in the back of you mind... a grace period window, where you can review whether he has made an effort, or not.
In addition, you should not have to remind him that he needs to change... your not his mother. If he knows he has to change in order to save the relationship then he will do it willingly.