回複：need your advice

I arrived in Chicago to visit my fiance on 1st Apr. by B2 visa. The U.S. Border Officer stamped my visitor visa with a 14-day duration of stay. If it is possible my fiance marry me during this two weeks (we plan to sign the marriage licence) so that my B2 visa could be changed
--- Yes, you apply another B2 extension

and I could get green card to stay here legally?
--- If your fiance is citizen of US, you can get marrage
certificate and file I-140/I-485 in two weeks and wait.