what will you do if you family requires him/her to join there religion ? but you born and studied and graduated in a catholic school . what will you do and what will you say to your partner's fam???

I'd say avoid this situation, if possible. It will turn into a never ending argument. I am sure people can find people with similar religions, saves the heachache.

Choose Wisely

How important is religion to you?
How important is religion to your partner?

Will it hurt you or offend you to attempt to change your religion?
How important is the relationship with your partner?
How important is your relationship with your partner's family?

What does your partner have to say about it all?
How important is your choice to your relationship?

Is there conflict within you concerning their religion?
How much is it bothering you?

What are you willing to sacrifice in order to be with your partner?
What is your partner willing to sacrifice to be with you?

To what extent does your partner's family have influence over your relationship with your partner?

Perhaps you could get your thoughts straight by making a Pros & Cons list and discussing it with your partner?

While this issue would never happen in my own relationships, you are obviously having problems with it.
I suggest you have a long discussion with your partner about this.
Try to determine if your choices are whats best for both of you.
If no agreement can be reached, you might consider finding a different partner. Unless you can meet the family requirements, you will be in a relationship full of stress and lies.

Choose Wisely

honest talk

If she is not a gentile then you should not marry her.
If she is, then you can/should and make all decisions as head of
the family.