Jealous girl?

I have a friend who kinda has a two faced personality. and she would show whichever side she wanted to whoever she wanted WHENEVER she wanted. She was my first and closest friend when I started jr. high so I tend to feel more close to her than anybody...

else. I tell her a lot of things. I share my past experiences with her. I ride the bus with her and my other friend( tracey) every day. During times when its only me and her.. she would be really nice. But when its the three of us. I suddenly feel like its just the two of them and I'm an outcast. I can feel she is purposly leaving me behind. When we're walking to the bus stop its always them two in the front and I'm just trailing behind. But if I leave she would be like why're you leaving us. God.. are you to cool to hang out with us? So I usually just stay.. They talk about things in front of me that I no clue about. My friend always gives me these looks as though I did something wrong or like I dont belong. Everytime I get something new.. maybe new shoes because my other pair is worn OUT. she has something to say about it. She gives me these faces and tells me that I'm spoiled .. getting everything I want. I keep thinking about this issue. I WANT to be friends with her. I want to keep peace between everybody. One night.. something caught me while I was thinking.

Is she jealous?
or is she just being mean?

I think maybe just talk to her about and don't jump to conclusions... it depends on what kind of girl she is... she could be jealous and envious of you but you never know if anything I would just talk to her about it and let her know how you feel. With true and good friendships you should be able to talk about it and have things out in the open! good luck!

THANKS! =)