I think that any relationship that ends is over MANY feelings. I don't know how 6 words could have individually killed it unless it was "I will kill you very soon." or "I sorta slept with your mom." or something absoultely horrid like that.
Most guys/girls SAY that there was one thing you did wrong, but most likely, that was the best excuse from a culmination of feelings/events that brought them to that conclusion. I don't think anyone is THAT anal to break up for only ONE thing (save for murder/abuse/cheating) and be completlely unbiased towards everything else.
Like if you're an asshole and call her fat and hit her and stuff. Then one day she trips and falls in public and you laugh at her. She goes "I can't believe you laughed at me when I got hurt! I'm done with you!" and breaks up with you. She SAYS that it's because you laughed at her, but what about all the crap that took place prior? It's just a story but remember to not take everything at face value with breakups.
Women say that there was ONE thing you did wrong, but realistically, there was many things they felt was wrong in the relationship when they decided to break. Most women will attempt to work through problems until many problems add up to something they can't deal with.
3 out of 2 people have problems with fractions.