create an online questionaire form similar to the compatibility section of okcupid.com

i need a site that has these functions. i would like to create an online form for married couples. it will ask both the husband and the wife how happy they are in marriage. it will then ask them many questions about their relationship. they should be able to fill out the form together, or each one separately. that means that one could fill out the form and then have a link sent to the email of the spouse. the form should be in stages so that they can fill out part of it and then later fill out the rest. it should have a members login that will also know how to link the couple so they can fill out the form separately and then compare their answers after they both fill out the form, i want to show them their resulting compatibility score. i need you to use my grading system to write an algorithm that will compute a compatibility score and a more specific compatibility score in each category. this is similar to what [login to view URL] has on their website. but in addition, i want to have some advice for improving their relationship given to them based on their answers. i also need all the information in a database that i can have analysed.