Me and my boyfriend have been together for about a year-and-a-half, and have been living together for eight months. When we moved in, we fought a lot.
Even though we have resolved those issues, i have thoughts of being with different people, fantasizing what it might be like. I read that its normal to be attracted to other people while committed, but I almost have a feeling of dissatisfaction, or boredom.
I feel like the beginning of our relationship was intense, exciting romance, and I don’t feel that anymore. He’s a really sweet, awesome guy who treats me very well. He irritates me at times, but that will happen with anyone.
My question is, how do I know if it’s my status or my life that needs sprucing?
LemonVibe 
Unfortunately, I think this is a situation that only you can figure out. You’re exactly right that every relationship is going to get stagnant at some point. And you’re exactly right that you’re going to feel attraction to others. So really, you already know anything that strangers on the internet will be able to tell you. 🙂
And that’s why only you can decide whether what you’ve built up with your boyfriend over the past year-and-a-half is worth keeping, knowing that no relationship will ever be perfect, or whether it’s time to move on. The decision is going to hinge on the exact details of your relationship (you know, make a list if you have to), and no one aside from you is going to be privy to that information.
I do wish you the best of luck with this, though.