I've been in love with my ex for over 3 years
Why do you feel you are still in love with her?
I still feel the love for her, But I cannot do anything about it.
When a relationship ends people are expected to move on with their lives. It is normal to care for people after a long relationship.
But my life was better with her.
I know it's difficult, but you really should try to take steps to move on from her. It's not healthy to be in love with an ex for that long.