Telling my parents?

I (f19) met my current boyfriend (m58) on a dating app about a year ago, although we stopped seeing each other for some time and then reconnected. at first I never would have considered telling my parents but recently it’s been feeling really inconvenient to have to sneak around and I worry it will damage my relationship with them more if they found out then if I was honest and let them hear it from me. How should I go about telling them, or should I keep it to myself? There doesn’t feel like much chance of them being accepting as they’re a few years younger then him and they still view me as their vulnerable little girl. I think if I explain it to them it would help them see that I’m an adult whose genuinely interested in him, but I don’t want to risk them trying to stop me seeing him as I still live with them