<human>: Can you summarize the given text in a few sentences?

As I said I'm a 20f only child. 
Since I can remember there has never been any real romance between my parents, they're never intimate around each other. My mum is very emotional, dad not. My mum has repeatedly confided in me that she is lonely as my dad pretty much ignores her most of the time. I think they are probably still together because of me.  
While this is a clear problem, my mum doesn't want confrontation so just sort of carries on and hides it so while my parents very rarely fight it is only because the issues are ignored. I don't know what to do as I am stuck in the middle and can't take sides. 
All the family members I have that I am even vaguely close too live in other countries and I can't bring myself to tell my boyfriend or friends. I confided in a college friend when I was drunk several days ago but no one else has ever known. 
I feel like I'm the only one who sees any of this as I have no siblings so have no one who understands.  I'm looking for how I can cope with this or anyone esp. an only child who understands and could offer some advice. 
Sorry for the wall of text.
<bot>: Married parents have unaddressed issues mum confides in me that she's 'lonely' how do I help them or deal with this on my own