Am I the Asshole?

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The original was posted on /r/AmItheAsshole by /u/IAmNotMeEither on 2023-06-26 18:51:04+00:00.

Just like the title says. My partner has a long-term friend of over 20 years, and they have had feelings for each other back and forth for at least a decade. Over time, there always seemed to be something preventing them from ever getting together, and now my partner says they are done pining for them and is completely committed to me.

But that seemed to only encourage the friend's attention more, and recently while intoxicated at our home, the friend kissed my partner, and got in my face with threats and insults, directly stating that they should be with my partner instead, and refused to leave, even going so far as to call the police when forced outside.

Now, it has been less than 2 months since this event, and this friend has had a string of bad luck, and now needs a place to stay. So, my partner, out of a sense of loyalty to this long time friend, as offered our living room to them. Am I the a**hole for being upset?