i am horse and my boyfriend is rat, so there is any possibility to marry each other.

It is very possible because my parents are born as horse and rat as well. They love each other and had both my sister and I. They are still happily married to this day. My father's parents didn't want him to marry my mother but they have come to the fact that they love each other.
Hope this helped!

anyway thanks for the reply, my boyfriend choosed to breakup cuz he don't want his parents to be up set.