Being Rejected(Additional Informations)?

I falled in love with a woman, but she rejected me because she already have a boyfriend. I asked her whether i've been given a chance to wait for her. She agreed. So I planned to wait for her for 2 years(starting from yesterday).

I feel that i can be better than her current bf, i can prove to her i can make her feel comfortable and happy but she did not gave me a chance. What can i do about this? Im feeling extremely sad because of this. I just hope that she can just give me a chance to prove to let her see that im better than her current bf, can anyone help me by giving advices or good ways? Thanks

Additional Details:Well, she said that im okay, just only because she has a boyfriend, i dont know is she giving me fake hope or not but i feel that she's the best and probally this is the strongest feeling i ever had for a girl. Is there nothing to do to confront her?

Sorry if i did spam, this is my first time using this yahoo answers ><