Am I right to be angry still?

[sardine]

So I'm an 18 year old guy who graduated highschool in June. I am "good" friends with this girl for about 2 years and we talk everyday through Facebook and text. The only times she ever asked me to hangout with her at school is when her friend wasn't there and only if her friend wasn't there, which we hung out twice. Now since june we've been talking and we haven't hung out at all. Not one. I asked her plenty of times but she has some excuse. I confronted her about hanging out a few times recently an she'd brush it off. She's the only person I talk too. I don't have any friends other than her and it just irritates me how our friendship is. She knows I like her a little bit, is that the reason? I'm super angry cause she also lied about how she felt about me in front of her friend in June. It really hurt my feelings. Am I right to be mad still about that? The stuff in the past? I did confront her about it she just said she didn't wanna talk about it, she never apologized either. I just feel angry cause I feel like she is using me so she has someone to talk to. We don't hangout, I asked a bunch and she has an excuse everytime.