You should always tell the officer the truth when being asked any questions about your intent.

How can i go from being an asylum applicant to a adjustment of status applicant, based on marriage to a US citizen?

You may apply for an I130 through USCIS and after approval, apply for adjustment of status through the immigration court.

How can i bring my girlfriend to the United States?

After marriage you may petition for your spouse through consular processing, although the process takes 2 years until the visa becomes current.

I lost my naturalization certificate and I need it to apply for China visa asap. What can I do?

You should consult with an attorney who specializes in Chinese immigration for assistance re: entry requirements.

You should consult with a criminal defense attorney to determine next best steps and resolving this case.

How long does it take to appeal a denied I 130 form?

More information is needed re: the denial. It is best to consult with an attorney for assistance with such an appeal.

Do I need to print out median chat as a proof of relationship for marriage base green card at the IS Embassy ?

You should bring as much evidence of your good faith relationship with you at time of interview - this includes chat and social media transcripts.

You should list the address where you currently live with your spouse in Spain.

My green card expired yesterday 11/21/2018. Is it ok to file I-751 today via overnight mail. Thanks in advance for your advice

You should file immediately overnight with a request for excusing the later filing.

It is best for you to wait until you meet all requirements of naturalization before reapplying. An appeal at this time will likely be meritless.