Nick Gordon’s fears for Bobbi Kristina Brown

Nick Gordon is ”scared” of losing Bobbi Kristina Brown.

The 25-year-old star was left devastated when his girlfriend’s mother Whitney Houston – who he had lived with from the age of 12 – passed away three years ago and he insists he did everything he could to ”protect” her and her daughter, who is in a medically-induced coma after being found unresponsive in her bath on January 31.

He said: ”I lost the most legendary singer ever and I’m scared to lose Krissy. I want to let all you guys know I did everything possible in the world to protect them.”

Nick was speaking in a new clip from his interview with Dr. Phil McGraw, which airs today (11.03.15), and he seemed panicked throughout, especially when the host told him to ”man up” and check into rehab.

He said: ”I’ve been so strong for so many people for so long, so please don’t tell me to man up.”

Since recording the interview, Nick – who claims his girlfriend’s father, Bobby Brown, has prevented him from visiting her hospital bedside – has checked into an unnamed treatment facility.

An earlier preview clip saw Nick, who was accompanied during recording by his mother Michelle, speak of how much he ”hates” the New Edition singer.

He said: ”I miss Krissy and Whitney so bad. I want them back…I hate Bobby Brown.”

Bobbi Kristina’s aunt, Leolah Brown, recently slammed the upcoming TV show, claiming Nick is being investigated for ”attempted murder” and it could interfere with police investigations.