verbally harassed

Need po legal advice on what to do coz my boss's wife is harrasing me thru txt messages accusing me and his common law husband that we have an affair. I myself has a live-in partner and is happy with my man. The said wife even threaten me na mag-iiskandalo sa opisina and will hurt me physically. I want to file charges. Can I even file a restraining order for the said wife to avoid any damages that will be inflicted towards me? She has no concrete evidence of the said allegations but hearsay. She might have eyewitnesses about me and my boss, who happen to be a good friend, together but no intimate contact or whatsoever. Can i file charges? What's the best legal actiion that I need to take? Di na po ako nakakapasok sa opisina sa takot na gawin nya ang banta nya. Hope u get back to me as soon as possible.