Yes, your dob is 12 Feb 1988. There are no hard and fast rules to calculate when exactly you will get married, since the definition of marriage is at variance from place to place, culture to culture etc. Read my article on ‘Definitions in Astrology” at http://navagrahastro.blogspot.in/.
You are most likely to get married in 2014 failing which it could be delayed to late 2017 or in 2018.