Best friend vs boyfriend

SORRY SO LONG =/
JUST NEED SOME HELP...

okay I've been dating my boyfriend for almost 2 years [2 years in sept]
and I've known my best friend since 5th grade [now a junior]
before me and my boyfriend started dating and knew the other liked each...

other, my best friend was always just like 'he ask you out yet?!' and fine and stuff with him.
but now that we are dating they dont seem to get along, my boyfriend takes things seriously a lot and my best friend jokes around a lot.
so that just causes problems.

but recently [friday] she had broken up with her boyfriend and wanted to come over bc she needed me and I had told her that I was hanging w my boyfriend.
but we had made a promise a while back to always be there for eachother when they break up with their boyfriend or vice versa.
well that was the first day in a long time that me and my boyfriend were actually able to hang out alone and just talk.
so he wasnt to happy about it and stuff but said she can come over for a little bit [came over bout 8 he had to be home by 11] so she comes over and we are thinking she will be over just for bout and half hour or so to talk bout it and stuff.
but no she stays the night with me and stuff so my boyfriend is just sitting in the living room by himself while im in the other room with my friend and hes getting upset and I cant tell her to leave bc she needed me and stuff.
so than me and him were arguing about that, than the next day I was going to his house to talk about the day before and she doesnt want me to go bc she dont wanna be alone and stuff and asks me if I had to choose who would I choose and I said itd be a very hard descion but itd be you and I dont remember why but she got upset bout that and drove away, than textd my boyfriend saying I didnt mean to ruin your night and stuff like that and my boyfriend tells her to go do her ex that she had just broken up with which I didnt like when he told me he said that and she had told him that she wishs I would date our guy best friend [my boyfriend gets really jealous of him] so than it just starts in argue ments and stuff.
and my friends been saying now that she hates my boyfriend and wouldnt care if he died, she would just bc id be said but shed laugh if he died and all this stuff.
and im just stuck in the middle of it and have no idea what to do bc I which ever side I dont choose ill get yelled at and stuff.

what you guys think??

U SHOULD CHOOSE WHO you LOVE THE MOST AND SIT BOTH OF THEM DWN and TELL THEM THEY'RE BOTH WRONG 4 THERE REACMENT AGAINST you and TELL your BESTFRIEN THAT you NEED A LIL SPACE WITH your BOYFRIEND ALONE AND TELL your BOYFRIEND THAT HE HAS TO B PATIENT and THAT YALL WILL B ABLE TO HANG OUT ALONE SUMTIME

I kinda agree with meeko 09! you should tell them that you love your bff and wanna spend time with her but you also love your boyfriend and wanna spend time with him. if ure bff and boyfriend really love you they will understand