Show

Show (FALSE APPEARANCE): An appearance of something which is not really sincere or real.

Usage:
They put on a show of being interested, but I don’t think they really were.

Excerpts from soaps, novels and films:

Bold and the beautiful

“Jackie: Eric gave me this ring the day that he agreed to marry you because he wanted me to know that his love for me was real and that his marriage to you was just a show.”