I am in a relationship, and though my partner lists his 'religion' as Buddhist, on Facebook, it's really more as a nod and out of respect for me, than for any personal vocational reasons.
He respects my calling, and is curious.
He tells me (and I know you only have my word for it, but I'm being honest) that he thinks I'm one of the kindest and least harmful people he knows.
he has mellowed much in the time I have known him.
He's still volatile, but friends have marked upon the changes in him.
This is more, I am sure, out of a desire to effect change in himself as a result of 'seeing', than of any direct influence I have purposely tried to implement upon him, myself....
Any 'problems' within the relationship cannot be laid at the feet of Buddhism. It has not caused any dissent, division or rift, or clash of ideas.
Rather, whatever may have brought any of these about, I would say is down to my own sense of attachment, grasping and clinging, and seeking satisfaction in transitory things, fleeting and impermanent as they are.
I make every Effort to practise in my relationship. If I fail, it's my fault.....
Hope this helps.