This isn't about HIM being a loser or not being a loser...
The question was:
HOW do I make her insignificant?
To make HER insignificant you need to believe that it was SHE that got the short end of the stick. It was SHE that will end up with a man who can't be faithful and lies. It is SHE now that will deep down be worried that if he can do that to one woman, he can do it to any woman (including her)
The "loser" reference was meant to be a MINDSET for Swimming. It is your MINDSET that will make her insignificant. When you move toward the place that you realize that she can HAVE him (a man who can't be honest or faithful) then she will not only be insignificant in your heart, but in reality.
IN other words, you let HER BELIEVE that she got the BAD part of this whole situation and that you are GLAD... "You can have that "loser" attitude.
She will then start to secretly think.. "what is wrong with him if Swimming doesn't want him. If nobody wants him but me, mayb there IS something wrong with him"