如果BF今年年底前結婚的話, 是不是我可以以合法身份留在美國, 還是我需要先回國, 再申請來美?
-To marry to your BF (GC holder) is not helpful to maintain your status. You need to keep your legal status by yourself such as OPT and then H-1B, etc.
另外,要等多久才能有臨時綠卡?
-until your hu*****and becomes a U.S. citizen, and then he can sponsor your GC application.