This meant he had to be on dialysis and his kidneys functioned at just five per cent of the average capacity.

She explained: “I decided to get tested to see if we were a match because I didn’t want to watch him die.”

Luckily for the couple, the surgeries were a big success and both made a full recovery.

But while you’d naturally assume the man would be eternally grateful to his girlfriend for what she did for him, he then had the cheek to cheat on her seven months later.

In a follow-up video, Colleen explained how her ex told her he was going to Las Vegas for a bachelor party with some guys in his church.

At the time, the TikToker was in the thick of her final exams and trusted her boyfriend completely so didn’t think any more of it.

That is, until he turned up on her doorstep and confessed to cheating.

“A lot of arguments later, I eventually forgave him and gave him a second chance,” she said.

But three months later, the guy brutally dumped Colleen over the phone.

She claims he said: “If we are meant for each other, God will bring us back together in the end.”

Unfortunately, the break-up only got messier from there.

Describing how her “ex had some nerve”, Colleen claimed he told her: “You only donated your kidney to look good.”

Needless to say, her videos left viewers absolutely reeling.

“You have THE biggest heart and he didn’t see it,” one replied. “His loss.”

“I wonder if he understands the seriousness of donating a kidney,” another added. “You literally sacrificed your life for someone. You are a beautiful soul!”

Meanwhile, a third wrote: “A part of you will LITERALLY always be with him.

“Whatever scar it left him will be a constant reminder forever. I’m sorry this is AWFUL.”

This story originally appeared on The Sun and has been reproduced here with permission.