MMA fighter War Machine is still a fugitive from justice -- after allegedly brutalizing his girlfriend -- because he thinks he's doomed if he surrenders to police.
War Machine, who's been on the run since the fight early Friday morning, tweeted late last night that he went to the home of his porn star girlfriend Christy Mack to propose to her -- but found another man at her house when he got there.
Christy ended up in the hospital, and police named War Machine their #1 suspect. In one of his tweets, he said ... "The cops will never give me fair play, never believe me."
Christy's family and friends tell TMZ ... War Machine is delusional about Christy. They say he and Christy were no longer in a serious relationship, and he had no business showing up at her house.