<human>: Edit: I should specify, I do not live in the same town as my dad.

The situation:

Me: Nursing student with high stress level and part time job with months left in my degree path. My dad and I have a very close relationship- kindred spirits. He has been a strong support for me throughout college.

Him: Dated a woman for 7 years, fell in love. They both decided to share their lives together. He is poor and couldn't afford to get her the ring or wedding she wanted so they agreed to have a marriage-like commitment and live together. She was a guaranteed part of our family gatherings and a huge part of his life. 

He never saw the break-up coming and was still happy with the relationship when it happened. There's little-to-no chance of them getting back together and he is reeling. 

She sends mixed signals to him about his chances with her in the future and it infuriates me to hear about it when he tells me these things.

They still keep in contact, although it isn't advisable. She sent him his stuff, he sent her hers. She felt guilty about all the help he gave her in her new house so she sent him supplies and cash.

It has been heartbreaking hearing how torn up my dad is. I've been one of his main supports through this situation and I sometimes feel out of my depth and, honestly, really depressed due to empathy for him. I want to be strong and supportive. I want to be someone he can rely on when he needs someone there. This is just such a unique situation and I am unsure of how to do this.

Any advice is appreciated.

Provide a brief overview of the text.
<bot>: Dad is dealing with break up of long, very serious relationship. I want to be as supportive as I can. Advice please?