It depends if that person wants to change for the better. I have been married for 12 yrs to a "bad boy" thinking I could help him change over time... it did NOT work out that way until he decided to change- grow-up. I'm still with him, but it hasn't been easy AT ALL! You have to ask yourself if you're pepared to live this way the rest of your life? And also, can you live w/o this person? Basically, is the juice worth the squeeze? No one changes unless they consciencely make the effort themselves to change.