Two middle fingers bent touching palm, thumb and 1st and 5th fingers extended. I believe that is "I love you". My daughter and I took sign language classes several years ago. It has come in handy on more than one occasion. Our church did a lovely Christmas cantata one year and three of us "sang in sign". It was lovely!
I "signed" back to you...did you see me?? Probably not. Any way, it was something nice and sweet!!