Is this girl avoiding me?

OK so after I talk to her a couple times I try to talk to her again but I never ended up doing it because she is always with her friends and I'm too shy. Now when I did was I tried to wait for her but I wasn't making it obvious or I tried being in places where she would be, didn't work. Then one day, she was right next to me and I pretended not to notice to see if she would talk to me, she didn't and she went to talk to her friends. I don't really know if she noticed me or not.

On another day I went to a spot where she gets picked up by her mom every day and waited for her but I tried to make it look like I wasn't. She and her friends noticed me but I didn't make eye contact. and when she was finally heading to the spot with her friends I went back into the school.

Then after that when I start talking to her again she acted different. mean she was smiley before, now she smiles less.

Another time, I went outside and she and her friends were outside talking. She made eye contact with me but looked away a second to listen to her friends. Then I went one direction while she went the other with her friend.

Another time involved her and another friend heading up the stairs while me and another friend were too. I thought she looked at me but she said when I talked to her that she didn't notice me. One other time involved her and another friend talking but when I was near they went in. However neither of them looked at me so I'm not for sure on that one.

Another time involves her talking to her friends. Once again I headed outside, she made eye contact but kept talking to her friends. then when I looked back she and her friends looked in my direction, I tried not to look at them.

Oh and another thing, my mom knows her family from work so she invited someone who is related to her to a Christmas party but she didn't arrive and my mom knows that like her and said "If she really liked you she would try to come to the house.". OK now that's all done, I want to point out positives. when we first said hi at the school (I'm new by the way) she looked at me and smiled big. and when I first talk to her she said "we need someone to talk to come talk to me". then when I said hi to her again, she said come here and I did. Then my mom called her relative, her relative said "She is very approachable" and she said in the background "that's what I keep trying to tell him." And my mom said "well she doesn't think you're strange based on what she said and how she said it.".

Sorry it was so long, please comment and share your thoughts.