The first thing you need to keep in mind is that you need to make a list of all the common things between you and your lover. Obviously there must be few because you wouldn’t want to get in a relationship with someone who has nothing in common with you.
After going through all the things that you have common, make a list about the stuff that you guys don’t have in common. No two persons can love all the same things at the same time. There must be some difference if not many. You need to sort them out. There is no reason to panic and you can work on the differences later on unless they are very marriage. Like if you are two are from different religion and your families won’t approve of you, then that can be a major problem.
Calculating love compatibility is not just about finding out the similarities and difference because you are not searching for your soul mate here. You need to decide about what you want from your life and what your plans are for the future and how you see your lover fitting in. Do you want kids? Do you want to move abroad? What does your partner think about your plans? How supportive she is?
Another important thing that you need to figure out while you are calculating love compatibility is to search for the qualities in your lover that you want. Obviously you must have several things in mind about your partner and how you have imagined your life with her. Searching for those qualities will allow you to justify your decision and it can make your life really easy.
Last but not least, you need to make sure that both you and she want same things especially about the family. Because love is not just about fun and enjoyment, it is more than that and your whole life is dependent on it one way or another.