So you are ok with everyone having the same rights and responsibilities under the constitution so long as they make the choices that you would make or approve of?
I believe marriage, as defined by the majority of our society for the past 235 years, should be between a man and a woman. Not a man and a man, not a woman and a woman, not a couple of women and a man, not 10 women and 10 men.
A very liberal view and broad definition of the 10th or 14th Amendments is a slippery slope. Gay Marriage will just be a beginning.