Looking at your horoscope we see that your 7th house which is the prime house of marriage is ruled by Mercury. Moon which is the 8th lord and most malefic planet in your horoscope is posited in the 7th house with 12th Lord Mars. Venus the significator of marriage is combust and also retrograde. As Venus is exalted but retrograde is will give effects of debilitated Venus. Your marriage house and karka Venus are weak and marriage should be done with proper matching of the horoscopes.