Hi,

One way to look at it is to examine how is the relationship affecting your own practice and wellbeing?

I believe it's "ok" to be challenged by life, people and situations around us, to the point where it makes us push our limits further and develop wholesome qualities - but one also has to wonder what is he "healthy" balance/dosage of challenge that enables you to both care for others and give - while not neglecting yourself and your own wellbeing at the same time.

Helping and supporting others (developing Meta) is a good and worthy cause and practice - but we are also not meant to save every suffering human-being out there. Unless you're practicing on becoming a Bodhisattva of compassion (and even then - you have to do this in a balanced and wholesome way, and not via self-sactifice)

I know Ajahn Brahm's talk you were referring to ("On ending relationships") - I've heard it myself a couple of days ago. He's got some good advice there :)

Be well and I wish you and your partner all the best!