What do you do when your in a relationship, then meet the person of your dreams?

someone else can come along only if you allow it to, in a happy relationship there is no need to allow another person in your life in that special way so my answer is it should never happen, and it hasn't for me because I will leave someone I am unhappy with before I look for someone else and I certainly do not look for anyone when I am happy with who I have.

I personally think you owe it to your self to grab at what might be your future happiness, I guess it would be a very hard decision and could happen to anyone...but you would have to make sure your feeling are really what you think they are before you going breaking hearts...