Is it normal to have a crush on your sister?
A confusing or unwanted crush on your sister can happen, and having a feeling doesn’t mean you’ve done anything wrong. Keep clear boundaries and don’t act on it romantically or sexually.
Feelings can show up in surprising places, and a crush doesn’t necessarily mean you truly want a relationship or that anything is wrong with you. You’re not responsible for every feeling that pops up, but you are responsible for what you do with it.
Because she’s your sister, keep the relationship firmly non-romantic and non-sexual. Don’t pressure her or make her responsible for managing your feelings; giving the crush less attention and focusing on other connections may help it fade.
If it’s persistent, upsetting, or hard to manage, talking it through privately with a counselor can help you sort it out without judgment.