You are an individual who would be in control of the situation around you generally. You get disturbed too quickly and you settle down as well pretty fast, overall you are a loveable person.
Astrology can analyse and find the compatibility with your partner and find the level of matching between both of you by analysing both the charts, however it cannot analyse and find whether you will get in to relationship or marry with a particular person.
As per your chart, There are no indications of any change of relationships with your partner. You are fortunate and you will always have a good time with your partner throughout your life.
Mithuna Lagna with the Lagna lord Mercury posited in the fourth house in exaltation and in conjunction with Sun and Rahu; Moon posited in the Lagna; Seventh lord Jupiter exalted in the second house; Mars and Venus conjunct in the fifth house.