Something like 60% of marriages do last the distance - its easy to overlook look that with all the focus on messy breakups. I always swore I would never have children unless I was in a rock solid relationship that I was a sure as I could be that it would last the distance. Ended up with a flake who lied about about contraception in order to get pregnant then bailed when she realised that kids actually meant some effort and giving up stuff. Still my two kids are happy, Im happy and she's still floundering around. Never can tell how things pan out.