The man who kept a journal of every day with Barbra Streisand is now writing the hardest entries yet. James Brolin, who proposed three times before she said yes, recently told producers he "can't commit right now." Their separate bank accounts are finally merging as medical bills mount. After their 25th anniversary last year, the couple faces their biggest challenge. Hollywood insiders reveal Brolin refused a $2 million role just to stay home. His next chapter might be his most heartbreaking.