<human>: It's happened a few times now, meet nice guy, explain I only want a casual relationship whilst the guy agrees, he over a time frame says he wants something more serious. I always am dubious- I'm generally a cautious person and I find emotional intimacy quite difficult. So we continue the casual relationship, and whilst emotional intimacy increases, I begin to feel more secure in the relationship as they guy will convince me of their love.

Then the relationship will escalate up to the guy asking for long-term committment ex. Marriage or moving in. This will happen over a short-time frame ie. a few months and so naturally I refuse, its way too soon for me. But as we both want different things at the moment, the relationship breaks up and somehow, despite not wanting any real emotional intimacy, I am the more heartbroken one. This needs to stop happening. Is it something I am doing wrong?

Can you condense the text into three sentences or less?
<bot>: I [23F] keep inexplicably getting into emotional intimacy in relationships I do not want and then become the more upset party at their ending. Let's stop this from happening!!