How old are you this year and have you reached this year's birthday yet?
7th house domicile ruler is indeed Mercury. In the 12th house, this could signify either a sickly partner or children, or the native's suffering due to relationships.
The other issue is the conjunction between Saturn and Venus by sign in the Midheaven. Despite Saturn being of the party in favour (day party: Sun, Jupiter, Saturn) and being the participating trigon lord of Sagittarius, Saturn and Venus combinations tend to be negative for relationships. Jupiter hurling his rays to Saturn and Venus lessens the negativity, but it's still there.