Boyfriend destroying in the past has been clumsy at worst and ineffective at best. Let’s explore some new ways of doing this – making the boyfriend unappealing in her mind rather than ‘destroying’ him.
Let’s begin by saying that if she was SO happy with her boyfriend, she wouldn’t really be giving you the time of day, would she? Always keep this in mind. You will need to get across that you are her REAL type of man without explicitly stating this. Here are the things to key in on when trying to destroy a boyfriend.
1. Failure to commit
2. Jealousy-inspired arguments
3. Physically or mentally abusive behavior
4. Not assertive enough in bed
5. Being too predictable
6. Wanting to do off-the-wall things in bed that the girl isn’t into
7. Acting too needy
8. Acting withdrawn
OK. Those are some of the most common complaints from women in regards to their relationships with men. Now, you need to find out from her which one(s) her boyfriend is displaying and the boyfriend look inferior because of it. Here are some examples:

Failure to Commit:
“That reminds me of my friend Jim. He drives a truck for a living, but he met a girl from a wealthy family and started dating her. She was
really into him, but in his mind he just didn’t deserve a girl of that status. It was like, inside his mind, he was always worried that she would leave him because she could have any man she wanted.

Jealousy-inspired Arguments:
“Try not to be mad at him, OK? It’s just that you are probably the highest-caliber woman that he’s ever been with, and he knows that if you ever left him he would never find someone of your quality again. He’s just worried, that’s all.”

Abusive Behavior:
"This happens all the time when a guy is with a woman that he can’t handle emotionally. He just can’t handle all the things that are going on inside his head, so he acts out in this manner. He’s probably never been in demand with women, so he desperately wants you to stay with him.”

Not Assertive in Bed:
“I’m sure he wants to please you sexually, but he can’t because he’s insecure. It’s like the guy with a really hot girlfriend who ends up cheating on her with some fat girl that is not nearly as attractive, since she makes him feel better about himself. It sounds like he has a case of unworthiness, but you should bear with it for awhile, I’m sure he’ll do better soon.”

Being too Predictable/Boring:
“You two have become so close that you are more like a sister to him now than a lover. He’s really secure with you so he doesn’t feel the need to do anything special any more. 9
Don’t you see how most marriages evolve? This is the way. Now, with me, I’d rather keep the spice in a relationship, but I understand that it’s hard and most people don’t have the time for that sort of thing.

Off-the-Wall Sex:
“Since he’s never had someone like you, he feels the need to objectify you. He can’t open up to you because he risks the possibility of being hurt, so he turns sex into some sort of perverse game.”

Acting too Needy:
“Well, you should understand that this guy has nothing else going for him, you’re the only thing in his life that makes him feel important. Without you his life would be meaningless, so you can’t really blame him, he needs you.”

Acting Withdrawn:
“He’s just afraid to open up to you since he feels he doesn’t deserve someone like you. If he opened himself up you may not like what he reveals. Now, with me, I believe that communication is incredibly important in any relationship, but I can understand where he is coming from. He really doesn’t want to lose you.”

Or you can not be a dirtbag and go for another girl. Just a thought.