Burton shared a photo of the pair cuddling one another as the 27-year-old planted a kiss on her forehead on a social media post, reports the Mirror .
Writing on his Instagram story, he said: “My little angel, I will love you forever.”
Caroline had been due to appear in court after being charged with assaulting Lewis in December.
The 40-year-old always denied the charges while her partner urged them to be dropped.
Caroline and Lewis remained a couple in her final months, despite a judge banning him from contacting the Love Island host ahead of her trial.
They had been desperate to spend time together but the court order meant they spent Christmas apart.
On Valentine’s Day, the day before Caroline died , Lewis publicly declared his love for Caroline after it was rumoured they had split.
He told her that he loved her as he wished her a happy Valentine’s Day.
Caroline was laid to rest on Monday in a private ceremony by her close friends and family, with no media present.
A full inquest into the circumstances surrounding her tragic death is set to be held in August.
Many of Caroline’s friends paid touching tributes to her today.
Stacey Solomon posted on Instagram : “Today it doesn’t feel right to be on social media. So from me and the boys, we hope you have a good day.
“Hold your loved ones close, give them all of the cuddles you have in you and let them know how much you need them in your life.
“You never know when they really might need to know. Love you all. If you’re struggling with today, yesterday, the thought of tomorrow, please let someone know. Anyone.”