My Girlfriend And My Bestie – rom-nce

Gud day toriperians i have a big issue rite now..
i have a girlfriend we’ve been dating for four month now but i know her tru my bestfrd(bestie for abt 12yrz nw) just two month into my relationsh¡p she told me that shez is sorry that she once had a s*x with my bestie i forgive her becus both of us have nt meet then.. About a month ago she told me shes sorry that they both k-ss but it waz a mistake i let it go now, this week she told me she went to visit him while discussing he k-ssed her again i just try claim myself down cus am sick i go tru her chat with him only to find him messaging if he has the chance to go down with her he will grab it ….rite now am confuse on which decision to take my bestie na person when be say i dey protect him girl but he dey planned to take my own touch ground am sick and in a confuse state i need your help please