I completely agree with everything Ev has said, forgiveness and seeking God for health and direction is the only true Christian response here, not seeking revenge through a court of law. In any case, no attorney would take this case for a number of reasons. If you could sue someone for contracted venereal diseases between consenting partners, there would be millions of these cases. Furthermore, it would be impossible, especially after all the time that has lapsed, to prove in court that the source of your disease is indeed this person.
DOn't get me wrong, I really feel for your situation and I pray God to meet your physical, emotional and financial needs, in the name of Jesus.