How to deal with a jealous girlfriend?

My girlfriend gets insanely jealous from the smallest things and it’s getting out of hand. Yeah I admit that I did cheat on her once, but that happened a long time ago. I don’t buscar women por ID o chat with them online behind her back anymore. While I admit that I might accidently like some misceláneo girl’s selfie on Instagram o Facebook, it really doesn’t mean anything. She doesn’t get it though and will completely go off on me when she sees that I’ve liked a girl’s foto o comentó on it. How do I deal with this?