Young and dating

Hi!!! My boyfriend and i have been together for almost 3 years now, and i cant help but get the feeling that our relationship has stopped progressing. Hes a local artist and he performs 2-4 nights a week. Sometimes i feel like i want something more from us, but i cant explain what that is... I know hes not ready for marriage and honestly im not sure if i am either... Is this feeling normal after almost 3 years together?