16 w & haventtold my parents

Turning 20 on the 21st this month and I’m not sure why I don’t want to tell them. I’m just afraid of what the family will say because right or wrong I don’t want to hear it. I know it’s going to be hard , I will have to make sacrifices etc I just want them to save it. But it’s not the biggest reason as to why I won’t tell them ... I think I’m just really shy and anxious... any tips or help?