Looking at your horoscope we see that your Lagan is Pisces and 7th house which is the prime house for marriage is ruled by Mercury. Mercury is posited in the 8th house which is never auspicious. Sun which is the separative planet and also 6th lord is posited in the 7th house. The 7th house and 7th lord is weak. Doing proper matching of the horoscope is important before marriage.