How to stop being selfish

I am a revert. I got married and have been for 3 years. I live in a joint family. I have realized I am very selfish. I don’t like to help out in cooking. I will be happy to clean. I also realize I don’t want to share my food, time, or anything with my in laws. But I am happy to do all just for my husband and children. It’s gotten to point I am starting to hate them all. Is there any way to change this. It’s making me depressed and wanting to constantly have thoughts of running away from everything in life.