Hi bil8
Yes, I agree, that is confusing behaviour.
However, it
is possible for a girl to like a boy, without wanting to be his girlfriend.
At university, I used to sit next to the same boy for most classes. He was very good-looking and very nice. I think the other girls were too shy to sit by him. But I had been employed in an office, so was used to working alongside men. Plus, I was married, so I thought nothing of it. However, I do think that I had him confused, too. He looked absolutely amazed when he discovered that I was married. Maybe he picked up the wrong message, because I always sat by him and I did find him very pleasant. Maybe this girl is in a similar category.
Or maybe she wanted to see your reaction when she mentioned her boyfriend ~ it might be that she is attracted to you and isn't yet sure what to do about it ~ or maybe she just enjoys your company ~ and happened to see some Cadbury's chocolate on the way to college.
You could try asking her about the boyfriend and see how she responds???
I don't know.
But good luck!
You will probably find out what is going on in due course.
Welcome to the forum.