Girls, Hi there is guy friend I really love and we use to be very close he could not stay a day without talking to me but because of a mutual friend?

We had a fight we stopped talking for sometime then we start speaking again but we were not very close but j started noticing that the mutual friend of our amd he are living together they are not dating but are really close her ex boyfriend was also my friends best friend who stays with them but she is living in my crushes room I came to meet them after months and I don't feel good u feel sad what should I do I am confused why did he get close to her all she tried to do was sabotage our Friendship

Girls, Hi there is guy friend I really love and we use to be very close he could not stay a day without talking to me but because of a mutual friend?
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