I feel for you that this has caused you so much anxiety you needed to talk to the samaritans.
Sometimes the anxiety is too much and it's like throwing a sandbag over board letting people know the impact of their shortcomings. It has to be honed to perfection though so that there is not even a small part of it that they can read and convince themselves isn't true.
Goodlucktime that sounds awful. I'm glad I only wasted 6 months on my'experience like that. We met and went on three dates, and kissed, and then he agreed we had emotional intimacy and it would be lovely if we could combine that with physical intimacy but not in the context of a relationship. What!? I said no. I was strong to begin with although honest, I told him I had much stronger feelings for him than the arrangement he wanted, so I was prepared to say good bye and good luck and I expected him to clear off, but he didn't 'go'. He stayed, as a friend. But he wasn't really a friend, but it was the label he used. Eventually I had a moment of lucidity when he sent me a screen shot of a conversation with a woman he'd been flirting with and she'd turned him down flat because he didn't want a relationship.She said she was looking for a relationship. He thought it was 'sad that she wanted a relationship so desperately' that she wouldn't even talk to him. So bam, I respected her better boundaries, I respected her recognition of her own agenda, and the 'friends' cognitive dissonance fell around me like rubble in that moment!
I had pages and pages written out in draft email, eventually i just reduced the five pages to ''you chose a woman who loved you as a close confidante, and ignored all the boundaries between a friendship and a relationship''. I didn't send it. But it's on the tip of my tongue, permanently and that clarity protects me from getting sucked back in to ''friendship'' with him again.
The last guy who dumped me was great until he went on holiday and sent one text about five days in, then nothing..... silence for another five days. The day after he got back, I knew I'd been ghosted or faded, I did that hash thing before his number and dialled him just to basically say ''hi, i know this is over, but hi, this is an admin call, I'm braver than you, common decency v important to me, so just wanted to draw a line under this more formally and say goodbye and good luck".