New people in your life
When parents split up and live apart, they often start to see new people. These new friends could then become a boyfriend or a girlfriend. Don't worry. You are still loved and cared for. It could be normal to say you don't want to meet these people but you should give them a chance. If your mum or dad like them a lot, then you should give them a chance. You may like them too. And you could have even more people to love and care about you.
Sometimes, when your mum or dad has a new boyfriend or girlfriend, they may already have children of their own. Again, do give them a chance. It might be good to meet new friends and share things. Do talk to your parents if you are having problems with this. Things will settle down. Different things can be good when you get used to them.