In the composite chart you 2 have many connections - both mercury retrograde (so understanding each other), his venus hits your sun-mercury, his jupiter-neptune hits your moon, and your pluto is in the middle of his moon-saturn-mars complex.
His mars in Scorpio trine your venus in Pisces shows harmony. With this and the moon's being touched by each other there is much water/emotional connection possible. Emotion and communication shows potential between the 2 of you.