Fans devastated after Liam Payne's girlfriend reveals their life changing plans before his death

Liam Payne's girlfriend Kate Cassidy has revealed the One Direction star wrote her a letter about his plans to stay 'together forever' before his sudden death.

The 31-year-old passed away earlier this month after falling from the third floor of the CasaSur hotel in Buenos Aires, Argentina.

Tributes have been pouring in online, including from Payne's girlfriend Kate Cassidy, who took to Instagram yesterday to commemorate the star.

Cassidy took to her Instagram page to share photographs of her and Payne alongside a heartfelt statement.

It read: "I don’t even know where to begin. My heart is shattered in ways I can’t put into words. I wish you could see the huge impact you’ve had on the world, even as it feels so dark right now.

"You brought so much happiness and positivity to everyone – millions of fans, your family, friends, and especially me. You are so incredibly loved.

"You are – because I can’t say were – my best friend, the love of my life, and everyone you touched felt just as special as I did. Your energy was contagious, lighting up every room you walked into.

"None of this feels real, and I can’t wrap my head around this new reality of not having you here. I’m struggling to figure out how to live in a world without you by my side."

Kate Cassidy took to her Instagram to commemorate Liam Payne (Instagram/@kateecass)

The influencer reflected on getting to be 'kids again' with Payne and 'always finding joy in the smallest things', praising her partner for having 'the kindest soul and the most fun-loving spirit', adding it feels like she's 'lost the best part' of herself.

And Cassidy also shared a letter Payne wrote to her about their future together.

She says the pair sat outside one evening several weeks previously 'manifesting [their] lives together' and the singer gave her a note which she keeps 'close', even though Payne 'told [her] not to look at it'.

According to Cassidy, it says: "Me and Kate to marry within a year/engaged & together forever 444."

In her Instagram post, the meaning of 444 is explained as 'the favorite number sequence of the angels', saying you will see the sequence when 'feeling alone'.

Cassidy's post resolves: "Liam, I know we’ll be together forever, but not in the way we had planned. You’ll always be with me. I’ve gained a guardian angel.

Cassidy shared a note from Payne (Instagram/ @kateecass)

"I will love you for the rest of my life and beyond, carrying our dreams and memories with me everywhere I go."

And it's not taken long for social media users to flock online in support of Cassidy, many devastated after hearing Payne's future plans.

One Twitter user said: "Wait this is devastating my heart goes out to her."

"My heart aches so bad for this woman, i really hope she is okay," another added, as a third commented: "Manifesting she finds happiness again."

If you have experienced a bereavement and would like to speak with someone in confidence, contact The Compassionate Friends on (877) 969-0010.