I am a Pisces man who's in love with a Cancer woman. here this out and advise me plz?

Sweetheart, you sound young...take it from an older Cancer woman. When a cancer is not interested, there is nothing you can do, especially if the interest is in someone else. We tend to be one at a time creatures and when we love, it is very intense. She will not notice you (like you want her to) until the one she loves really hurts her. Move on...and try to focus on something else of value in your life. Do not waste your energy on futile possibilities.