the hoodoo tradition has a number of jobs for doing this sort of thing.
Your profile is pretty sparse, though Kalispell is awesome!! ( : So I dont know what your path is or what your experience with doing work is, but I can point you in that direction. Nation sack and knot spells are common for that sort of thing.
But so is counseling and keeping lines of communication open.
Spells can help, but fundamentals of communication and sharing love are what are going to make this work ultimately.
Good luck, hoodoo is kind of easy to get into and I like the energy of it, but your mileage may vary.