please help

[xaned]

dear I am doctor and surgeon I am pakistani while working in abroad I met a girl and we began to like each other and we decided to marry she was amarican citizen ,she applied for my fiancé visa and petition was approved but she changed her mind and we did not move on and it left undecided and nothing happen further now I had to go to USA for business meeting and I had a sponsor from medical company and I am also doing job here they refused my visa 2 ice even they were satisfied in interview but in last they just said sorry you don't qualify for this visa, it was very crucial for me to go there for my business there and also I have a relation with some one she has green card she will be citizen in coming December she said she can also send me visit sponsor ,I don't know what to do how to go to USA soon please guide me what to do