How do I remove my photo gallery from messanger

[Sindylove]

I sent 4 photos from a private album to share on messanger Facebook page to Riki Brian from my gallery and only sent to him now the whole of my private album is on messanger photos on all my contacts and I can't remove it please help me

 

[B. Diddy]

Welcome to Android Central! How do you know other people can see the album?