Short Horror Stories

I have always loved my friend Jessica. I supported her in everything she does. I'm even fine with third wheeling with her and her boyfriend. Her boyfriend is really nice, and handsome, I think they really suit each other. We live in the same apartment but in different rooms.

"Adrienne, will you come make chocolates with me? It's for my upcoming anniversary celebration with my boyfriend." she asked me one day.

"Sure. See you at 2." I replied.

I was gonna head to her room when the power went out. She called me through her phone and told me that if the power still doesn't turn back on in a minute, we would have to postpone the chocolate making. I stayed in my apartment until the power went on. It was already 2:30. I went to her apartment and saw her with a knife stabbed to her stomach. I quickly called the police to investigate. Her boyfriend came too. They checked her apartment and found a suicide note. It stated "Sorry." and "I love you". The officers asked if it was her hand-writing and of course we both agreed.

"I still don't know why she would kill herself." I murmured.

The officers declared it was a suicide because of the positioning of the knife and the suicide note.

"Maybe she just haven't told you she was depressed. " an officer said.

"No." we were shocked by the sudden outburst of Jessica's boyfriend. "It wasn't suicide. It was murder." he countinued.

Question: Was it murder, or a suicide? If it was a murder, who could have killed her?