Need help šŸ˜ž

Today, i recieved a call from one of my bf , girl friend telling that my bf was dating her and saying bad stuff of my bf, i am so sad and angry, i talked to him and he says that he just see her today before buy me some flowers, but i still confused and i don't want to lose my bf, i love him so much and i know he loves me too, cuz he showed it to me everyday.
Sorry for grammar mistakes (dominican) šŸ˜¬