<human>: I recently got out of a relationship of several years, I'm leaving the country mid next year. I began hanging out with an ex of mine, from years ago. We agreed on starting a no-strings relationship a few months ago, I wasn't looking for a serious relationship. We've also become close friends. It's been good! Until now. He seems to be beginning to get upset at the idea of me hooking up with someone else, something I haven't done yet. He's also become annoyed that I wouldn't be bothered if he were to get with another girl. I do care for him, but not in the way that I'd become overridden with jealousy should he get with someone else. 

Now, I enjoy what we have, and really don't want it to end. Is there any way to salvage this?

Can you provide a brief overview of the text?
<bot>: I started a no-strings relationship with a guy and now he's acting weird about me hooking up with someone else. Can this be salvaged?