My bestfriend and I are fighting... How do I stop it?

wow i thought i had drama! anyway, me and my bestie are kinda goin through the same thing, we have been best friends for about 3 years now and for some reason where spliting apart. she has this new bf and she hags out wit him 24/7, every time i tlk to her its always about him, or like a couple days ago she asked me 2 hang wit her at lunch(knowing that she would just ignore me the whole time and be lovey dovey with her bf, i still went) not only does she ignore me but when i leave she comes up to me later and is all like "wat happened, y did u leave" actin like nothin happend. she has some new friends and she chooses them over me eery day, but when they get in a fight or somethin she comes runnin back to me. ive learnd to just get fiends who care about my feelings and will stick beside me. i still hang out with her where just not that close.....and it sucks!, i love her to death