After 30 years of dating, one child together, and many proposals Farrah Fawcett said she will finally marry Ryan O'Neal. During an interview with Barbra Walters, O'Neal said he has fallen even more in love with her as he watches her battle cancer. Fawcett was diagnosed back in 2006 and is now fighting for her life. The full interview with Barbra Walters will air on ABC's 20/20 on Friday the 26th.