The girlfriend of a boy tragically killed in a hit-and-run has written a heart-wrenching open letter to her "beautiful boyfriend".

Kyle Coen, 14, died after being knocked off his bike on the A2 London Road in Bapchild, near Sittingbourne, on Monday night.

He was on his way to see girlfriend Donna Clarke when the crash happened outside Bapchild Cricket Club.

Now Donna has penned a highly personal letter, saying Kyle meant the world to her.

Speaking after taking part in a balloon tribute to the schoolboy, she said: "You'll always be a part of me.

"Every time I see a rainbow I will always say that's you.

"We always had something for rainbows, and you always had something for butterflies.

"We had such great memories. I will never forget the way you kissed me on my right cheek then left cheek, then my forehead, then my chin, then my nose, and we had a cute kiss."

Donna and friends release balloons in Kyle's memory

She said Kyle was a "lovely, beautiful boy". She would kiss his photograph every night and would one day be with him.

Donna finished the emotion-charged letter saying: "Kyle, RIP, I love you. Never forget me, I will never be forgetting you. I will be with you soon."

She signed off the letter as from "your strong girlfriend donna Clarke/Coen! <3<3<3<3."

Just a day earlier, dozens of teenagers gathered at a town park to remember Kyle, from Sittinbourne.

Around 60 pupils from Sittingbourne Community College arrived at the Rectory Road playing field holding helium-filled balloons.

Moments later they gathered in a circle, with Donna in the centre, before releasing them in to the air and shouting ‘Kyle’.

The last one to be released was Donna’s red heart-shaped balloon with a photo of her and her sweetheart attached to it.

Kyle’s mum is believed to have watched the vigil from a distance. His form tutor Sally Hills was also in attendance.

Kyle has been described as a "gentle, hard-working lad" who had "many, many friends".

The mother of Kyle's best friend Alex Stock, also 14, revealed the pair had been "laughing and joking" together on a day out just hours before he was killed.

Linda Stock, from Bapchild, said: "They've been inseparable since they broke up from school. They had so many plans.

"They were at our house then went to Alex's grandfather's and dug the pond out with him. They had been laughing and joking.

"Kyle was going to see his girlfriend and was on his way. It was just sheer luck he was not with him."

Floral tributes left at the scene where Kyle Coen was knocked down on the A2 London Road, Bapchild

A 27-year-old woman and a 23-year-old man, arrested in connection with the crash, have been released on bail.

They will return to a Kent police station at a later date.