Why do most relationships end in divorce or breaks ups or drama?

That's why I'm never getting into another relationship or getting married for as long as I love. I mean if course you're going to have arguments and conflicts and it's normal in relationships like my dad said, but still I don't wanna deal with drama, cheating and all that bullshit. I love my freedom and single life. Some of my friends tried to hook me up but I flat out told them NO.