why gals cannot be together

I dont know,, I may be wrong here but I have seen that gals are not able to co exist for a long time as friends even a small thing can be taken as a huge matter and is often blown up and the ame thing is not with the boys they can share each and every thing but not the gals I have seen some gals who looks to be the bestest of friends but if you have a closer look they are like how to kill each other for ex. there were 2 gal in my degree days pinky and mridula who were like coloser then you can imagine and one day out of no where they were like ready to kill each other can you imaging the mood swing last time you saw them they were like we cant live without each other and the next day what the hell is she doing here i don't want to see her ugly face. I do agree that boys also have some diffrent opinion on certain things and most of the boys have a fight over the matter of gals only well I have seen most of the big dada of our time trying to avoid the matter in which a gal is involved and not for the wrong reason i have still not seen and gals who have a lasting relationship and if you have seen any of such friends then plz let me know and if you thing otherwise also i would love to here from you