The absence of a marriage proposal from boyfriend Ryan Anderson might be one of the reasons why Gia Allemand committed suicide, a source close to “The Bachelor” star believes.

Allemand, who was admitted to University Hospital in New Orleans on Monday night after she was found hanging and unconscious in her New Orleans home by Anderson, died on Aug. 14 due to “critical loss of brain and body functions.”

Although it remains unclear why the 29-year-old took her life, sources believe she had been battling depression from a strained relationship with Anderson, who is a power forward with the New Orleans Pelicans.

Anderson and Allemand had been dating since 2011.

“Gia and Ryan were a happy couple. It’s unfair to categorize their relationship as rocky, but in the weeks leading up to her death they did have their first major fight,” a source told Radar Online.  “And because their relationship was so solid for the most part, Gia had expressed her sadness that Ryan hadn’t proposed to her yet, telling friends she was upset over it.”

“There were literally NO red flags that Gia would take her own life,” the source added. “Even with how upset Gia was over the rift in her relationship with Ryan, friends just cannot believe she would commit suicide over it. The whole thing is just heartbreaking.”

According to a New York Post report, Allemand was convinced that her relationship with Anderson was over, and she had been making plans to move out of their New Orleans home and set up base in New York City.

“I’m not that shocked [by her suicide], because of her ups and downs,” a friend told the New York Post. “She fell victim to her own perfection and they were having problems.”