<human>: Can you give me a shortened version of the text?

I dated Jack for about a year and broke up with him because I realized I was happier away from him.  He would constantly push my boundaries regarding sex and lied to me regarding his mistakes.  I have no intention of ever getting back with him but made the mistake of not immediately going no contact.  So I would wake up to multiple texts, facebook messages, or emails from him.  So this week I decided I had enough and sent Jack an email telling him I do not wish him to contact me anymore.  I blocked him on my phone and have his messages forwarded to another box but I can see that he is still emailing me despite the fact I asked him to stop.  I have anxiety and the fact he's still trying to contact me has been putting me on edge.  I do not feel safe working with him anymore and need to let my boss know to not schedule us together.  He normally works at a different store but he does fill in shifts at my store as needed.  How would I approach my boss about this?  I am just not familiar with the etiquette and I need to keep this job since its related to my major and works with my schedule.
<bot>: Ex who fills in shifts at my work is harassing me via email.  Need to ask boss to not schedule us together.