When expressing that your mother will always be in your heart, you can share a heartfelt and sincere message to convey your feelings. Here's an example of what you could say:
"Mom, there are no words to express how much you mean to me. You've been there for me through thick and thin, and your love and support have shaped me into who I am today. I want you to know that no matter where life takes me, you will always hold a special place in my heart. Your love is a guiding light that will stay with me forever. Thank you for everything, and I love you more than words can say."