<human>: Summarize the given text in a few sentences.

I check my instagram several times throughout the day, mostly during class. A lot of times I look at the following tab where it shows you what pictures your friends are liking. I've noticed my gf has recently been liking almost all of her ex bf's friends pictures. 3 guys in particular. They post maybe 2 or 3 photos a day and she likes about 50% of all their pics. Normally I wouldn't care, I mean its just instagram. But here's the weird thing, she doesn't even follow any of them. That means the only way she can be seeing and liking all of their photos is if she's constantly searching thier usernames several times a day. Everday I'll see that she liked some of thier photos that aren't even 1 hour old. So basically she's looking up her ex and all of his friends profiles every few fucking hours. Oh and shes also told me they don't talk at all anymore. Idk how I'm supposed to react. She already knows I have a trust issue because of something else she did before (basically cheated on me). What would you do in my situation?
<bot>: found out my girlfriend has been looking up her ex's and his friends social media accounts several times a day and liking lots of their content