My [19/M] girlfriend [18/F] is obsessed with a male celebrity to the point where it hurts me. Am I being overly insecure?

Here you are... And in the comments you stated it was Harry stiles... So basically , I've been with this girl about 1 year and a half , and i I'm working hard at my job so that i can be able to buy us a home and live together in the near future. But she just keeps going to these "childish" concerts with her 1 friend( she's 18 and single no wonder) who it the only one who invites her to these concerts . They both got in early to the concerts to get to the front row and they actually travel just to see these "boybands" together. idk what to do , i might just break up with her , because this is the second time this happens , and when i see her face i just get disgusted for how did i manage to accept dating her , already knowing she had childish behavior I'm about to break up with her , because i fell in love with a person that i do not appreciate entirely Ps: my gf has books , printed images in her bedroom walls of these boyband guys , and its like justin bieber and one directions guys! TL;DR; Getting frustrated with GF childish behavior , what to do

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