<human>: Can you give me the gist of the text in a nutshell?

I'm pretty torn up. I feel completely blindsided. I thought we had a happy relationship, and I'm still completely in love with him. We had our two year anniversary about 4 months ago and right around that time we touched base about where we saw the relationship going, and we were very much in agreement about how we felt and future desires. I feel so shitty and broken up. There has been a lot of stress in our lives the last few months, I think that has a lot to do with it. He has been holding back issues I wasn;t aware of. we argued a few nights ago, but I thought we were working it out like normal, he still seemed upset, fast forward to today and he basically told me its what he wants/best for him, and his mind was made up. I asked if I could do anything to remedy the situation and he doesn't seem interested. I've never been so caught by surprise by a breakup. We live together and I don't even know where to start, the rental market in this city is at something like 2 or 3% vacancy. I don't know what to do.
<bot>: Sudden breakup. Live together. I thought we were in it for the long run. Feel like a salted snail.