Does this girl like me or is she unsure?

She's my ex and we broke because of reasons. We started talking about a month ago and these past few days at school we would hangout she invited me over to her and we talked about why we broke up there and sometimes at school. We flirt a lot I always bring her mood back up at her house we even took a nap together on her bed. Apparently I'm competing with another guy but yesterday I told her my true feelings that I want her because this guy asked her to this thing we have where I live but she wanted me to ask her and she was mad I didn't. As I told her my feelings I said we should go together and she said she would but can't because of the other guy. She said she needs time to think. Does that mean she needs time or just doesn't like me?
Does this girl like me or is she unsure?
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