if i date another do i need to be careful about what she believes
Without further specific information, your question is impossible to answer.
She might have more reason to be concerned than you
Dating “another” catholic? Will this be the second or third catholic woman you have dated? And why didn’t you capitalize “Catholic” here? Some of us use that lowercase form as a pejorative.
This is the funniest thing I have read in a long time.
If she is Catholic and knows her faith, the truth shouldn’t worry you. As Thomas Aquinas said: “We must love those whose opinions we share and those whose opinions we reject. Both have labored in the search for truth and both have helped us in the finding of it.”