I think he had involvement with her in the past, as you said there was a kiss and chart confirms the contact, but I'm not seeing anything going on now. Mercury changed directions and is slow still. There is also no reception to suggest interest from him towards this other person.
Mercury and Jupiter square next, while Venus moves away. I think the square shows difficulty between you. Jupiter in 12th in house of self undoing, fear... You should be careful not to ruin your relationship due to your own insecurity.
Sun changes signs in Virgo and reception changes, Sun in negative reception to Venus and Jupiter, and as Mercury is disposited by Sun, his attitude may change. I think less giving. There will be mutual reception between Mercury and Sun, balance between the two sides of him. Not quite sure how this changes things but I do believe if you give him hard time, he will not be quiet about it.