starting to have problems w/ my best friend Options

[lovescream]

i'm starting to have a few problems with my best friend. we never went to the same school except when i was in kindergarten and she was in first grade and we've been friends for 12 years. =\ well, like, we'd usually gain our closeness by going over each other's homes, etc. but lately, my mom and her mom are like.. fighting. they secretly hate each other now but they wont admit it ><;; so that makes us have less time seeing each other. and well, the other day we went to go hang out with each other after school, but not at our houses, out in public like at the mall but her group of friends were there and she just TOTALLY ignored me. I tried to go and talk with her, but she starts blabbing like I'm not there. ><;; Her friends ignore me less than her. Her sister was along as well, and btw, me and her little sister hang out a lot more since we are in the same school and I feel like I can get along better with her because at least she doesn't ignore me when she's with her friends. ><;; So instead of talking to her and her group of friends, or rather I mean trying, I just talk to her sister, who is also ignored. .__.

Yeah.. And not to mention, she's now being very very show off-y to things I taught her.
Like I taught her how to do some orgami things, and she's showing it off like she found out how to do it herself, not even a little credit for me, not even a "she helped me," and she's being praised. I guess this is sort of a jealousy feeling, but she doesn't see it in me at all. She still sort of ignores me too when she goes around bragging. ><;;

I don't know what to do -- try to get closer to her again or what ? Because talking to her isn't working.. she doesn't see the show offy part. .__. Or the ignoring part. -sigh-