I think my family is going to tear apart but I don't find my feelings about it valid
Why do you think your feelings aren't valid?
I don't want it to happen but the rest of my family seems like they'd be happier apart.
What you feel about any situation is valid and should be considered. If you are unsure about your feelings, you should consider the situation from another viewpoint.
OK, how about your viewpoint? What are your feelings?
I'm not sure I can comment on the situation because I don't know your family. However, I think that you shouldn't discount your own feelings just because they don't line up with what other people are feeling.