To get married is to combine two people into one under a bond. This is the religious perspective. Even if you do not prescribe to the religious view of marriage, you still need to realize that marriage is a big deal and that it bonds you to one man for the rest of your life. You cannot ever be with another person unless you get a divorce. However, you also want to try to avoid getting a divorce since there is no point in getting married at all if you are just thinking about the fact that you will probably one day get a divorce.
In other words, marriage is a big deal, and to dream that you are a bride in a marriage means that you may be going through a huge change akin to marriage soon. There are a few different things that might be on the same level of importance as a marriage in your dreams, one of them being the idea of moving places or of changing jobs. Maybe you are having a child or maybe you are moving from one state to another for college or for a new job or something like that. If this is the case you may dream that you are a bride on the eve of one of the greatest changes you will ever see in your life.
To dream that you are a bride may also suggest that there are two different perspectives or pieces of mind that you are trying to assimilate into your overall perspective on life. You have a viewpoint that you want to get across but you seem to be lacking in that ability and you also have another viewpoint that you want to marry to that idea so to speak. In other words you are thinking about an issue from two totally different perspectives and are trying to figure out how both of them can be true for you or how you can think about them so that both of them make sense to you.
To dream that you are a bride may also suggest that you are playing with the idea of how you express your gender or femininity. Sense marriage is the idea of two becoming one and since we also have parts of us that are both masculine and feminine, wearing a bride’s outfit and marrying a groom in your dreams could suggest that you are trying to more effectively assimilate those masculine elements of yourself with the feminine ones. This is not weird and you should not feel weird for dreaming this way, it just means that you want to be a little more expressive with your masculine side. Men have the right to be a bit feminine at times and women have the right to be a bit masculine. Once you realize this, you will find even more freedom. This is what you really want at your core after all.