Quick answer
Repeated unwanted conduct can require a safety plan and assessment for stalking or other protection.
Do now
Keep a dated log of contacts, locations, witnesses, and reports, when safe. Save original messages and voicemails without engaging to gather more evidence. Explain whether the person knows your routines or has access to weapons.
Local note
NJ VASPA and DC ASO procedures may be relevant where a traditional domestic relationship is absent; NY civil and criminal options need local screening.
Official sources
NJ Courts — VASPA brochure, DC Courts — Domestic Violence Division, NY Courts — Domestic Violence / Family Offense, National Domestic Violence Hotline — Internet Safety.