When expressing concern or worry in English, you can say "I can't help but worry" or "I can't stop thinking about it." These phrases convey a sense of unease or preoccupation on a particular matter.
When someone is constantly on your mind, it can be difficult to relax and let go of your concerns. It is natural to have restless thoughts and a sense of unfulfillment until the matter is resolved. Whether it is about a loved one's well-being, unfinished work, or an unresolved issue, these thoughts can consume your mind and prevent you from fully focusing on other things. It is important to find ways to address these concerns and create a sense of peace within yourself, as constantly worrying can be mentally and emotionally draining.