Before becoming the life partner, marriage is proposed by lover and engagement is made.
Here is the list of auspicious dates for marriage proposal or engagement in year 2013 (year of Snake), which is produced based on the Chinese almanac Tong Shu. (Click the image to enlarge)
Bear in mind that although the Tong Shu is a compilation of Chinese astrology and calendaring studies gathering wisdom of thousands of years, we should use it wisely and rationally, but not be too superstitious on it.
Good luck in getting your right life partner.