Feeling Stupid

So, I had a co-worker find out that I signed up for the Scholars by looking at my email over my shoulder. (SO ANNOYING) He kept asking how much it was and when I told him he acted like I was crazy and said he could help me for free.
C: I am in scholars
T: people will think I am stupid and waste money on common sense things
F: I feel like an idiot
A: Never, talk to him again, Hide my screen better, be secretive
R: freak out and in a panic that others will find out

Anyway, I am trying to not feel so irritated and stupid that he found out and might tell other people. I don’t even know what my question is but this really made me feel dumb.