Nick Gordon's Twitter messages grew increasingly sad and desperate on the eve of Bobbi Kristina Brown's 22nd birthday, including one posting that reads like a suicidal threat.

"I'm so hurt I wanna do myself in, I know I have to strongsic," Gordon tweeted Tuesday evening. His lawyer did not immediately respond to Breaking Celebrity News's inquiry about concerns for his safety.

Gordon has not seen his girlfriend — whose birthday is Wednesday — since she was rushed to an Atlanta hospital after he and a friend found her unresponsive in a bathtub on January 31. Her father Bobby Brown has rejected Gordon's repeated pleas for a visit to her bedside at Emory University Hospital, where she has been in a medically-induced coma for weeks.