((((hugs)))) I think it's great that your folks feel you are mature enough to be taking care of yourself right now while they attend to the new baby, who needs everything done for him/her. It's common to feel -and be- left out at this time, but I'm sorry you are experiencing it.
I hope you can side up to a parent, or both, and tell them you feel left out...and unloved.
So share here with us at PC, and let's get you feeling better about who you are. You are no less a person just because someone else is receiving love too. (((hugs)))
PS It's also common to not draw a lot of replies when you post on a weekend

IDK why that is exactly. TC