Is this friend jealous of me?

I have a group of girlfriends I met in High School.everyone tells me I look 10 years younger than them (we're in our late 40s). It is true as I keep slim and my family have young skin. Anyhow i was showing another friend a photo of us all that I took at a reunion the other night. She went through all of them and said 'she looks great', 'gosh she looks great' etc. She never said I looked great. She made no comment about me, despite the fact that other people I showed the photo to told me I looked like their daughter. Also at that reunion, a guy came over to me and said you're beautiful, in front of all my friends. They were delighted for me (as I'm the only one single now). So, my question is, why did this one friend (who also happens to be single) not make any comment about me?