If you know how you are and you know you wont change then you might as well keep this wife, you know the blonde will just turn into another wife that turns into another ex-wife and so on, put the cycle to rest here with this one you have kids and a family with, that damn "spark" and eternal happiness myth will make us do stupid things, yes I do strongly believe it's a myth, people change, prople grow, people fall in and out of love with people all the time, marriage is something you work on, you're not happy 100% of the times, hell you're not even supposed to be happy 10% of the time, because it's not just about you, it's about your significant other, and your kids and sometimes you need to ride in the back seat so it's their turn to be happy, then you go back in front while one them is in the back seat STOP trying to hog the seat bro, think about others