People don't always agree, even if we're madly in love with each other. As individuals, we formulate our own ideas and opinions. When we come together as a couple or in a group, opinions vary and ideas multiply. That's the nature of mankind. Keep that in mind as you plan your wedding, which comes with a good deal of decision making. From the start, tell your fiance you want to have an "agree to disagree" policy. Have an open and honest discussion on how it's okay to not agree on everything. There will be some decisions that are harder to make than others. For those, the two of you will have to compromise or find another way of coming to the conclusion. Disagreeing with one another, doesn't have to mean that one of you is right and one of you is wrong. Keep judgments out of it. It simply means you have differing views and for the sake of maintaining a healthy and peaceful relationship while planning a wedding, you will commit to one or the other. I often hear brides remark about wedding planning, "I just want my fiance and I to be talking at the end of this." That's how stressful this entire process can be!
Remember that your relationship takes a front seat to the wedding planning. Don't let the color scheme or guest list come in between you. If you disagree, talk it out, make a decision or compromise, and move forward. If there is something important that you cannot agree on, ask an impartial person to help the two of you come to a conclusion. At the end of the day, your wedding choices last for one day, while your relationship with each other lasts a lifetime.