What to do about boyfriend's ex?

They divorced in 2018(she initiated it and moved out) and have a 15 year old son together. I met boyfriend in 2022 and have been with him for 2 years now. She lied and told their son that I was the reason for their divorce. I didn't even know boyfriend in 2018. The son hates me because he believes the lie his mom told him so he moved out of boyfriend's house and into his mom's apartment. She has been cyber stalking my social media and having her friends do the same and recently has been having her mail sent here. The son suddenly got all bad grades once he moved in with the mom and we found out that he has a girlfriend that the mom lets sleep over in the son's bed. She has been calling boyfriend a bad father, saying that he traded her in for a younger, skinnier woman (me), and hoping that her son gets the girlfriend pregnant in the hopes that it'll bring her and boyfriend back together. She won't meet me or talk to me on the phone so there's no trying to reason with her. This affects me because boyfriend will be in a bad mood about it. I'm honestly getting so tired of the drama from this annoying woman. Should I just cut my losses?

What to do about boyfriend's ex?
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