Actually busy or no longer care?

So there's this girl that I've now known for 2 years and we're great friends. She used to like me when we first met but the feeling wasn't mutual. We would go out twice a week or something but that was until July. She went on vacation with her family for like 3 weeks and we stayed in touch while she was gone. She came back mid August and I asked her when she was free to go out and she said she was really busy the next couple of days because school is almost starting and things along those lines (I'm 17 and she's 16 by the way). It's now mid October and we haven't gone out since, we are still in touch and we talk a lot, and she invited me to a party on Halloween although I wasn't able to get tickets before the deadline. Keep in mind that 90% of the times we hung out she was the one who proposed the idea of going out. I want to ask if she's free this weekend so we go out but I don't know if she still likes the idea of going out with me because if she wanted she would've said you know. Also I forgot to mention I did tell her I like her last week but she said she likes another guy that she told me about before. I didn't really care that much but I don't think this changed anything friendship wise since she invited me to the party after that happened and everything is pretty much the same. Please tell me what you think and feel free to ask for any more details.

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I asked if she's free for the second week in a row now and she said she isn't free. Might just have to let it go to be honest.
Actually busy or no longer care?
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