Should I get back together with my ex?

Im really on a crossroads right now. My friends are telling me to move on from my ex but I cant find the will in me to let go of her. We had a really good relationship but it ended abruptly. It was in a steady pace and next thing I know were over. She said shes tired and Im not good for her anymore. She said I was toxic and that were over. Three of years of being together. Three years of loving each other. I really saw a future with her. It wasnt really love at first sight but when I saw her in that singles latin tour, I immediately felt a sense of home in her. I dont know if I should get back together with her or move on for good.