There are two things which are delaying marriage in your horoscope. I presume this is a female horoscope. First conjunction of Jupiter and Rahu which is known as Guru Chandal dosha, and second is bad placement and weak 7th house lord Mercury. Mercury is combust and placed in the 12th house. Jupiter the karka for marriage in a female chart is weak as it is with Rahu. Wear Pukhraj 6 ratti and above in Gold on your right hand Index finger on Thursday Morning.
Also do the Rahu Beej mantra Jaap “Om Brim Rahave Namaha” 108 times daily