As per your horoscope, yes there is Mangalik dosha in your horoscope. Also the 7th house lord of marriage is conjoined with Rahu which will give you bad results on the relationship front. Mars is the lord of 5th house of love and romance and Mars is debilitated. Your horoscope is not good on the marriage and relationship front and therefore you will need to be extra careful and alert on this front.
Venus mahadasha is going on and Venus is conjoined with Rahu in the 7th house. Venus is the planet of love and romance. Mercury the planet of communication is also combust. The possibility of your relationship getting smooth is not strong in the present period.