jbibiza: Number 5 Not showing enough attention
Dates don't just organize themselves and relationships don't spring from nothing. You might think that if you hang back and play it cool she'll come to you. Well, this is one of the major ways guys blow it. Most of the time, you're going to have to make the first move and let her know that you're interested. Not showing enough attention can blow your chances before anything even happens, because if she's debating whether or not you like her, she's not going to want to waste her time with the effort of the unknown. Moral of the lesson here: You can either let her know you're interested or watch as she leaves with the guy who didn't blow it and showed enough attention to her.
Number 4 Closing her off
There's little point in pursuing a relationship, only to keep her locked out of the rest of your life entirely. Yet some guys do this, and it's one of the ways guys blow it. They might have found the perfect woman, but, for whatever reason, choose to keep her entirely separate from the rest of their lives. She never meets his buddies, work colleagues begin to think she's imaginary and she's always strangely absent from family events. It might take a while, but this situation will blow the relationship to bits. If she's decided to be with you, then it's about wanting more than just your great looks and sparkling personality; chances are, she actually wants to hear the embarrassing stories your friends tell, meet that annoying workmate and see all those baby pictures your mom's been storing for just such an occasion.
Number 3 Not taking charge
The only good thing ballroom dancing gave the world is this lesson: The man should lead. You'll often find that women try to dominate a relationship by laying down rules and setting boundaries. Letting her get away with this is a big mistake. As much as she thinks she wants a man to follow her every command, in the long run she won't respect you for it. If you're any kind of man, you won't respect yourself either. If you think she's playing dating games to gain some kind of power, call her on it straight away.
Number 2 Smothering her
One of the first things you should do is dispel the myth that the man has to constantly give the girl all his attention. Flooding her with phone calls, flowers and giving her endless reasons why she's amazing won't win her heart, only her disgust. Eventually, she'll tire of feeling like the object of your obsession. By all means, be romantic and make sure you treat her well. However, if she wanted a creature that followed her around giving her undivided attention, she'd have bought a Chihuahua. Put yourself first for a change and she'll respect you more for it.
Number 1 Staying in relationship limbo
The quickest, easiest and guaranteed way to blow it is to be in a relationship that isn't going anywhere. You might think that you're taking things steady and not being overeager, but if after six months you're stuck doing dinner and a movie and still don't know her mother's name, something isn't going right. At this point, it's only a matter of time before she starts looking for a guy to have a future with. Not that a relationship has to proceed in line with a timetable, far from it. It should always be moving forward, with the two of you sharing new experiences and learning more about each other. If you want things to work, she has to know that this is more than just something to fill up your spare time, that it's something real.

.. about bloody time

..... what is it with the games.... you guys either want to be with us or not.. if you want to persistently treat us badly.. then maybe you should be batting for another team...