It’s a migration got my boyfriend one is it possible for me to fix him papers at 18 years old?

That depends on his situation. At the age of 18, you have passed the age of consent and are free to marry without parental consent in any state of the union. You can petition for him assuming that you are a US citizen or permanent resident. Whether his immigration case will be successful depends upon his total circumstances, e.g. mode of entry, past problems with police or Immigration, etc. I suggest that you have a consultation with a lawyer with experience in immigration law. Due to the limitations of the Lawyers.com Forums, Alan Lee & Arthur Lee, Esqs.’ (the "Firm") participation in responding to questions posted herein does not constitute legal advice, nor legal representation of the person or entity posting a question. No Attorney/Client relationship is or shall be construed to be created hereby. The information provided herein by the Firm is general, and requires that the poster obtain specific legal advice from an attorney. The poster shall not rely upon the information provided herein as legal advice nor as the basis for making any decisions of legal consequence.