What is my ex trying to tell me? Is he stalking me or what is his deal?

Anonymous
So my ex has been driving by my house at all hours of the night. We work together but he doesn’t talk to me in front of his friends that caused the break up. Behind there backs he talks and flirts with me. He blocked my number and I don’t know why. He blew my phone up. I don’t know what to think at think at this point. His friends recently started stalking me also and I’m ready to file a report.
What is my ex trying to tell me? Is he stalking me or what is his deal?
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