A woman who became obsessed with her AA sponsor sunk super strength lager before turning up at the woman's house with three knives and smashing her way inside.
Sarah Cahill turned on her victim because she wasn't gay. Her actions were described like something from a 'horror movie'.
The 41-year-old attended group counselling sessions with the woman, who she fell in love with.
She became infatuated with her after she became her voluntary Alcoholics Anonymous sponsor and stalked her.
When the victim, who is not gay and has a boyfriend, didn't reciprocate Cahill's feelings, she was sent disturbing messages.
Cahill threatened to cut the woman's father throat, while professing her love for her.
The victim ignored the texts and voicemails.
In one message, Cahill told her she would 'die for her', adding: "I just know in my heart it is you, you are the love of my life, I think you’re the most beautiful girl in the world.
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"I am in love with you, I always have been and always will be I wish I could make love to you just once.''
She then left a voicemail vowing to break into the victim's home and stab her.
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On October 16 last year, the victim was asleep at her home in Bury. Cahill, having drunk lager, turned up at the property armed with a Stanley knife in her handbag and two other blades in her pockets.
She smashed her way inside using a plant pot to break a patio window, before demanding to speak to the victim
Cahill was restrained by woman's father, who got out of bed and grabbed her.
In a statement, the victim said: "The messages disturbed and frightened me. Everything I felt was an overwhelming sense of guilt and shame.
"I often lay awake at night worrying about this. I didn’t tell her mother and father what had been happening because I was embarrassed. When she threatened to slit his throat I felt sick and terrified.
"That night I thought I was safe in my home and it turns out I wasn’t. I keep thinking about seeing the first knife and being so shocked that she had come to stab me all I could think about was protecting my dad.
"I was so anxious I couldn’t leave the house for nine days after."
At Minshull Street Crown Court, Cahill, from Middleton, was jailed for nine years under the terms of an extended sentence after a judge ruled she was a 'dangerous' offender.
She admitted aggravated burglary with intent to cause grievous bodily harm; stalking; and having a bladed article at an earlier hearing.
Prosecutor Robert Elias said: “The background to this is that Sarah became infatuated with the complainant to the extent that this became an obsession.
"Her feelings were not reciprocated not least because the complainant isn’t gay and this turned to feelings of resentment, and crystallised in a drunken desire by Sarah to stab the complainant.
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''They had been long term friends for four years having met through Alcoholics Anonymous and the complainant acting as a sponsor to Sarah.
"They formed a friendship described as almost 'sibling like' and Sarah thought she had fallen in love but the complainant had an existing relationship.
"Sarah found it difficult to accept this and became obsessed with the complainant. She picked up her first drink in two years and texted saying she was going to hurt herself.''
The court heard the victim tried to contact Cahill as she knew of a previous self harm incident and she found her that day and encouraged her to get help.
But that evening Cahill bombarded her with a number of voice mails and text messages saying: "If your dad ever calls me again I’ll cut his throat. You would be nothing without your mum."
It was then followed by other messages adding: ''I don’t mean what I’m saying we had some good times didn’t we?."
''You could have stopped this you silly girl.''
A further message warned of her coming to the victim's house break through the window and stab her.
Sentencing, Judge Bernard Lever told Cahill: ''This was a serious example of a very serious offence.
"You entered the complainant's home at 3.30am which must have been terrifying for the family. I have to certify that you are dangerous in these circumstances I have the power to extend the sentence. You won't be released until the parole board is satisfied that you are no longer dangerous.
''I am doing this to reassure the victims and because I have a duty to ensure safety from you to the general public.
"You, and indeed the young female victim, had alcohol problems and she became your friend. She had a boyfriend but you became infatuated with her and built up a resentment towards her father - it is hardly surprising he didn't feel comfortable about the way you were going.
''You had avoided alcohol for two years but you started drinking again the week before the aggravated burglary.
"You sent threatening messages that if her father ever called you again you would slit his throat and additionally that you would die for her by self harm.
''You broke a window to her home, the family home, and barged in and you had a Stanley knife in your bag and two knives on you, a long knife and a kitchen knife. Fortunately the father overcame you and bravely stopped you from becoming a risk.
''Let it be said that this offence carries an intention to cause serious injury, when the police arrived you struggled and caused a disturbance. This is against a background of a lot of threatening messages.
"You admitted that you had fallen in love with a young woman, that you had been drinking and on the evening in question drank super strength lager.
"The three victims experienced hurt and it is noteworthy that the mother has commented that you were always treated by them with nothing but kindness. You know that these three people will have been so worried and hurt by your behaviour.''
