Human behavior is complex and influenced by a variety of factors, many of which are subjective and unique to each individual.
When it comes to relationships and breakups, there is no guarantee that someone will come back after a breakup with a new partner. People's feelings and decisions can change over time and are affected by their emotions, experiences, and personal growth.
If your ex-partner has moved on and is in a new relationship, it's generally healthier to focus on your own well-being and personal growth rather than trying to predict what might happen in the future. Dwelling on the possibility of them returning can prevent you from moving forward and finding happiness in your own life.
It's essential to remember that breakups can be difficult, especially when you still have feelings for someone. Give yourself time to heal, process your emotions, and consider seeking support from friends, family, or a mental health professional if needed. Focus on your own growth and happiness, and with time, you may find that your feelings about the situation change and that you are ready to open yourself up to new possibilities in your own life.