Why Me? Why must the crazy ones bother me?

I work with this person who is nice but does not know when they are not invited into conversations. I talk to people and she will eavesdrop on my conversations with people. We stop talking and she will stand there hoping we will talk to her. She will get offended and walk away, even look like crying at times.

I’m not being mean to her but..she’s a “repeat offender.” Tells the same story over and over without realizing she is doing it.

Now there’s many people I don’t talk to. I go 2xs a week to this job. I work from home. So I am not there. Any suggestions on how to make the situation better?