Well said Spock. A relationship (doesn't have to even be marriage) that is only based on superficial qualities such as physical appearance is not going to last long. And hopefully you'll take into account other qualities besides looks such as compatibility . And relationships evolve right? That initial attraction will hopefully develop into something stronger, resulting in a companionship that comes from being together for a long time.
I guess some people like the thrill of the chase and the excitement of new things. And there's no denying that is exciting. BUT there's a comfort in being with someone who has, over the years, come to know and understand you so well that you can be yourself completely around them. Kind of a like a close friend. Or an old favorite t-shirt that fits perfectly and is so familiar to you.
Even if you were to leave your spouse and find someone "new" and more "attractive," how long is it going to be before you find this "new hot model/item" boring as well?
And Das Reich, what if your potential life partner was to think that about you? Would you feel comfortable with the idea of her leaving you for a newer better model after a few years? If two people sincerely put all their effort into a relationship over the years, only to destroy what they have built because a beautiful stranger comes along, is that right? You do understand that even with this "new person" you're going to have to go through the SAME *charade of flirting, courtship, compromise, arguments that you went through with your spouse, aka the *"older model."
There are temptations everywhere; alcohol, drugs, gambling, adultery what have you. But do have to give in? You always have the choice to be ABOVE these things. And I believe that the desire to escape is a part of human nature. Sometimes you feel like escaping from work/boss, life's chores. Sometimes people feel like abandoning their loved ones. I'm sure even parents feel like getting away from their kids at times. BUT if you truly and sincerely love/care about someone, you'll find that what you have is too meaningful and important to give up/throw away so easily.
I don't know what "decision" it is that you have to make. But it's very natural to have doubts and second thoughts regarding marriage. After all, you're talking about a life-long commitment. So, maybe you should take some time out to think things out thoroughly before making such a huge commitment. If your goal is to forever be chasing beautiful butterflies, then forget about settling down if you feel that the temptation is too strong for you. Why hurt someone if you don't share the same goals with them. And if you desire something deeper, then sit down and think about what exactly it is that you want in a partner. Think about your priorities and evaluate the situation at hand before making a decision. Otherwise it can lead to hurtful consequences for you and the other person. Try praying Istikhara for guidance:)