How do I stop feeling disgusted by my body?

F17 I’ve always been a little insecure about my body since I’m on the bigger side but in the past year it’s been way more than usual I don’t want to look in the mirror or shower because that means looking at my body and I just really don’t want to feel this way forever I know I can lose some weight and I have been but there must be more stuff I can do mentally to help myself right?