You have to stop the
wanting..... second you have to quit fighting your feelings, it only makes them stronger by feeding them. Accept your feelings 100% no matter how unwanted they are... The baloon will pop and you can
then release these feelings.
It is okay to love someone who does not feel the same about you. Set aside a small space in your heart and reserve that space for this person, but stop the desire for wanting specific things to happen!
The real problem is probably that you feel incomplete without this person, guess what, you are not

Get in touch with the true inner you, and good things will begin happening...
Take care,
RD