<human>: My gf and I have been together for 2 years now and have lived together for 1 year. It's been a what I thought was amazing relationship and we both want to get married and spend the rest of our lives together. The other day she was late for work and forgot her phone. She called me and asked me to bring it to her during her lunch hour. I had no suspicion she was cheating on me or anything like that but I was nosy and curious so I looked at her browser history to see what websites she browses.

It turns out she has a fake Facebook profile and has been looking at her ex bf's Facebook profile mulitple times a day for the past 4 months. It's only 4 months because that's as far as the internet history went so I'm guessing it's been going on much longer. It didn't look like she actually tried to contact him in any way tho. She visited his profile literally everyday multiple times without fail. From what I saw sometimes as many as 7 times. And every time she does she goes straight to look at his pictures. I'm obviously pissed and confused. I would understand just being curious and checking but this is so much more extreme.

Should I be as upset as I am? I know I need to bring this up but I don't know how too. I don't know what to say. Part of me feels like I'm just being an insecure baby but idk.

Could you distill the essence of the text into 1-3 sentences?
<bot>: gf has been looking at her ex bf's Facebook profile multiple times everyday and I'm unsure of what to do