if you really think you're good, combine your best poems into a book and take it to a publisher, but copyright first if you're serious. it might take time and money but if it's what you want to do then it's worth it.
if i were you, and i'm not, but if i WAS, i wouldn't get mixed up with someone in jail. it is wonderful that you are supporting him through this tough expericne in his life, but don't allow yourself to get involved romantically. i just don't see that ending well. be his friend, nothing more.