Follow the Golden Rule. That means apply the same rules to yourself that you'd apply to others, including him. Real men do in fact notice this; they just don't scream it out. For example, if he tells you he has a girlfriend and things are not working out, Stop! and think ladies and gentlemen that this could be a "test" on how you would handle the situation, so stand your ground and cut off communication (hint: "Golden Rule"). Don't go on about how you "don't NEED no man!" or about "men this, men that" if you don't want him treating you the same way. DO, on the other hand, treat him--and others--with respect, dignity, and honor. Others will notice, too, and who knows--if they know you want a good, real man but don't yet have one, they just might introduce you to one!
@Eric, ask yourself and please be honest (I know that you like being straightforward) if that woman was indeed the one* (let me clarify the one, wouldn’t want you to think that I am stuck in a Disney Movie ending). The one: being a woman that you would consider as a serious long term partner, that you would be proud to introduce to your family and with whom you could see yourself having children. Would you really risk losing the relationship by blaming not responding to a text because you are busy.