

"Love must be sincere. Hate what is evil; cling to what is good. Be devoted to one another in brotherly love. Honor one another above yourselves. Never be lacking in zeal, but keep your spiritual fervor, serving the Lord. Be joyful in hope, patient in affliction, faithful in prayer." Romans 12:9-12
This is from eHarmony's advice article entitled "8 Bad Reasons To Break Up" and I couldn't have said it better myself.
"3) Your Partner Finds Other People Attractive
Just because you’ve captured another’s heart, it doesn’t mean that you’ve removed the eyes from that person’s head, too. Even when fully loved up, it’s crazy to think that your partner has gone blind to the attractiveness of others. Physically attractive people are all around us, on TV, in film and even in the local supermarket, so it’s naïve to think that they’ll go unnoticed. There’s even a chance that your loved one will feel that pull of chemistry with someone else, too, so you’d better learn how to manage it. In a good committed relationship, the partners are not cut off to external influences, but they’re mature enough to know that acting on them is a recipe for disaster."
Well said, bravo...
2 seconds of "wow, aren't they attractive" never hurt anyone.
My first boyfriend was grossly jealous poseesive. I couldn't even say hi to one of my guy friends when I was with him. That SUCKED. The 2nd guy that was kinda almost my boyfriend was an even bigger flirt than me. Amazing. The last boyfriend...totally jealous. We had a bunch of fights about it. It was irritating...but I put up with it. Why did I do that??! (rhetorical question; I just realized what a tard I was!) I really mustn't do that again. If someone can't be confident in the fact that I chose to be with them, then they're not worth it. I'll probably just end up in a really frustrating situation for all parties involved...