<human>: Can you succinctly summarize the text in 1-3 sentences?

So my girlfriend and I always do everything together (8 month relationship) but recently she reconnected with a female friend and they went to hang out. My girlfriend then texted me saying that her female friend was having her boyfriend over and his male best friend who used to like my girlfriend. We got into a huge fight over this and once the dust settled she said that they're her friends even though she barely reconnected with them and said that she will hang out with them again. So I want to know if I should be worried. It's also worth to note I was one of my girlfriend's only friends before we started dating and all of her friends now are basically from me introducing them to her.
<bot>: girlfriend dint have many friends besides me. Reconnects with old female friend and doesn't tell me til later that a guy who used to like her will be there as well. Should I be worried?