Converting to please a partner, or more likely, the partner’s family, is clearly not a conversion motivated by a true commitment to Torah and living a Jewish life. The litmus test is simple: would this person honestly be willing to undergo the difficult process of conversion (and the subsequent challenges of living a Jewish life) if the relationship ended.

Converting to Judaism is not a one-day event, it is a life-long change and commitment. One can only do this if he or she feels strongly about the importance of accepting the responsibilities -- as well as the inherent rewards -- of being Jewish. This would be someone who has already spent significant time learning and studying the Torah, and has chosen, on his or her own, to pursue to conversion process.

This is not to say that no one has ever come to learn about Torah or decided to convert for the right reasons, even though the initial incentive may have been for another. But it is essential to ensure before the conversion take place, that it is being done completely for the individual and not for anyone else. If not, the person most likely has an ulterior motive, and becoming Jewish is not it.

Also read about Why should I choose an Orthodox conversion?