love in another relationship

To love someone who's taken, Is to live with constant pain. Knowing that your heart belongs to them, But their love cannot be claimed. I try to hide my feelings, To keep them buried deep inside. But the love I have for her, Cannot be easily denied. I see her with another, And it tears me apart inside. The thought of being without her, Fills my heart with grief and sighs. But i know that I must leave, For my own sanity and peace. To stay and watch her love another, Would cause my heart to cease.