I (37W) just found out that my boyfriend (36M) of a year plans to leave me and move back to England. (MA, USA)

My boyfriend and I have been together for a year, we live in a large East Coast city and share an apartment together. We both have stable careers and live in a somewhat expensive apartment that is manageable through sharing rent 50/50. In addition to just receiving a raise at the prestigious university he works at, he is working on a degree as well. We speak of marriage and children frequently and show love towards each other daily.
When we first met, he was fresh from a horribly messy divorce and I offered to give him the space he needed to heal. He told me that his ex was a horrible person who he grew to despise and ?couldn?t stand? being around her, and quite frankly was happy to be done with her,
We fell in love quickly with great intensity. We both shared with each other that we believed we were put on earth to be with each other.
Last September, I was casually looking through craigslist apartment listings and found an amazing loft outside of town that would make for a comfortable nest for us to work from home and relax at.
We moved in together after just 6 months of dating and despite apprehension on both our parts, things have been going great? or so I thought.
He has a standing appointment with his therapist every Friday morning at 11am. I offer to leave the apartment and go get lunch or run errands so he has a comfortable space to talk.
When I returned around 1 pm and sat down to work, I realized I had accidentally kept my QuickTime Screen record function recording on my computer. We share the same workspace and I have a job that requires me to record meetings that I have with certain people for legal reasons (no, I?m not a cop).
I know doing this is wrong and I?ve wished a hundred times over that I hadn?t, but curiosity got the best of me and I put on headphones and listened to his session. I know this is a total awful thing for me to do but he has been very depressed lately and I was hoping to gain some insight on why.
What I was about to hear has turned my world upside down.
He spoke of missing England (he was born and raised there and has been here for 5 years) and that last week he had bought suitcases and boxes because he was going to return there at the end of January. He then went on to tell her that he is unhappy with me and that can?t stop comparing me to his ex and that he misses her terribly, he misses her intelligence and the projects they did together. His therapist asked him if he was sure about moving, he chuckled and said ?absolutely?. I am assuming I am going to wake up one day and he is just gone, I mean even 2 weeks of notice is a horrible thing to do to someone. I am going to be stuck with an expensive apartment and all of the bills.
In addition to this, he told his therapist that I had been sick and had low energy the past week and was ill. He said this with disdain in his voice, not compassion, complaining that I had gone to bed at 7pm one night.
The therapist asked if I have any ongoing heath conditions and he said ?no, she?s a total hypochondriac?. This was a punch to the gut for me. I was born with 2 autoimmune disorders that are somewhat controlled by medications but I?ve been told by doctors that most people with the condition severity I have are in wheelchairs or on disability. I am very rarely verbal about my condition, the pain I am in every day, physically and mentally.
I push through the pain, I work 50 hours a week and run a successful business on the side. I volunteer at a foundation that teaches teens life skills. I cook for him every night. I clean the crust off the sink after he shaves. He knows of my illness. For Pete?s sake, he?s he?s a doctor, you would think there would be more understanding.
At this point what do I do? Do I confront him and just bite the bullet and admit I listened to his session? Do I say nothing and wait for him to leave? Do I start looking for roommates?
How do I recover emotionally, I mean what do you do when you find out your whole life is a complete lie?
TL;DR- Overheard a session my boyfriend had with a therapist and found out he plans to leave me without telling me.


Source.