So i've been in love with a straight girl for 3 years. Help?

Okay, and last year we dated twice, when she claimed to be biual, for aboout 10 months in total. She told me she loved me, and that she's always love me, and all these beautiful things. I'm absoloutely infatuated with her, her eyes, her smell, her voice, i just love her so much...but she's straight. I have no hope of getting over her, i just need help, please, my heart cant take anymore, help me...