Quickwrite - Tuesday

Dear Listening Ear, Recently I asked my friend if she wanted to hang out. I’ve known her for a long time and we’re pretty close. She usually doesn’t lie to me, but when I asked her to come over to my house, she told me she was sick and I believed her. Later that day I found out she was hanging out with someone else because of the pictures she posted on Instagram. I wouldn’t have been upset if she told the truth. Should I confront her about it, or mind my own business?
From, An Upset Friend