Should I tell my parents ?

Jaime
So I'm 16 going on 17 this year and I'm currently dating my SO who is 19 . We've been together officially for 4 months but we have liked each other for about a year . I just graduated from high school and I don't know if I should tell my parents .. They know we are interested in each other but they don't know that we are serious .. Should I tell them ?