Teen dating

My son is 14 years old and he's been dating a girl for about 9 months. At first I was against it than I got used to it, got to know the family, etc. But there seems be a lot of control, jelousy, etc. I'm getting tired of them fighting about little things like my son coming camping with us and another family and his gf yelling at him for going with other girls in the family, this gf breaks up with him to get a rise out of my son. I'm really getting tired and am not condoning this relationship anymore. Please help. I need come input