Mate i can speak from first hand experience and say that i dont think anyone is worth losing your mates over, unless your mates are a bunch of dickheads, but i dont think that is the case or they wouldnt be your mates. Its a complex issue that, but its worth thinking about.
Would you consider it being a jelousy thing if they take up some of your time and youre not devoting 100% of your attention to her? If that is the case, RUN NOW!!! While youve still got the legs to carry you!!
Mate that is just as bad really isnt it, yes you have to take the good with the bad, but when the bad is that bad, ill pass on it