The alternative, of course, is to get married, but not apply for adjustment of status thus keeping the L1 visa and not waiting 90 days for the EAD. If you prefer it this way. No one is forcing you to seek adjustment of status.
NYC EXPERIENCED IMMIGRATION ATTORNEYS
Phone: (866) 456-8654;
The information contained in this answer is provided for informational purposes only, and should not be construed as legal advice on any subject matter.
Law Offices of J Thomas Smith J.D., Ph.D
11500 Northwest Freeway, Suite 280
Houston, TX 77092
NOTE: Responses are for the education of the community at large and is not intended to be "legal advice." No attorney-client relationship is established by responses or comments.