Tilakumara met Archie while appearing together on the CBBC sitcom So Awkward and in her tribute she said that he had made her "the happiest girl in the whole wide world".
"Boyfriend doesn't do it justice. Archie you were my Person and Best friend all in one," she wrote. "To spend the rest of my life laughing and going on adventures with you, was just it for me.
"Everything made sense with you. You made me laugh like no one else and you loved me in such a way that I will forever just be grateful for.
"Being loved by you was a bonus, but I can proudly say you are the most incredible person that I have ever met and had the pleasure of being in love with.
"The world isn't ready for what's yet to come. You talented, beautiful soul, thank you for a lifetime I will never forget."
