questions for PJ 老師

Please help me answer some questions.

My current status:

1. EB2 I-140 approved
2. 485 still pending
3. EAD will be valid will November 2008.

Now if I quit my job, do I have to get married right away? My b/f is citizen but we are planning for the wedding till August. Do we have to rush now so I can stay here legally?

Thank you very very much!