My ex has a new boyfriend but still texts me, should I trust her again

Main Arjun Sinha hoon, Scorpio. 5 saal ka relationship tha Pallavi Sharma (Gemini, DOB 1 June 1999) ke sath. Usne mujhe chhod diya aur mere best friend ke sath relationship mein chali gayi. Ab vo breakup ke baad mujhe text kar rahi hai. Kya main usse dobara chance doon? (Arjun: 30 Oct 1993, 10:45 AM, Bhopal | Pallavi: 1 June 1999, 7:25 AM, Dehradun)