Your friend needs to work on the supporting documentation that the relationship with his girlfriend is not a fraud for the purpose of obtaining legal residency in the US. If he is certain that this is not a fraud but is going to be a family longstanding relationship, they could marry and your girlfriend will be able to petition on his behalf. Some other issues will come out with adjustment of status and affidavit of support. Nevertheless, that was not your question and your friend would be better of consulting an attorney prior to starting the process.
Answered on Apr 19th, 2013 at 1:59 PM