Marques Houston Gets Restraining Order Against Raz B

Marques Houston is so afraid his beef with Raz B could turn dangerous, that he obtained a temporary restraining order against his former friend ... TMZ has learned.

Houston and Raz B (real name De'Mario Thornton) have been feuding since the middle of last year. According to docs filed by Houston last month, the feud began when Raz posted a video online accusing Houston of molesting him when he was a child(a claim Houston has denied).

In the docs, Houston claims the video "has caused me emotional distress and caused me to fear he will be violent toward himself and others." Houston claims that Raz also spoken many times about killing people as well as killing himself.

Houston also claims in the docs that Raz (famous from his days in the band B2K) has threatened him specifically on the Internet several times and this has made him "fear that my life, my girlfriend's life and the lives of my family and friends are in danger."

A judge granted the temporary restraining order last month, requiring Raz to at least 100 yards away from Houston.

A hearing to make the order permanent is scheduled to go down tomorrow.