How do I show this girl I like her?

[James]

Okay.. So,
I started college this past week and there is a girl who was in the other group, and on a trip on the wednesday we got randomly paired up with people and I got paired with this girl, and at first I thought she didnt like me.. but after 30mins we was getting on like a house on fire.
I was making her laugh and we were just getting along so well.
Then on the bus back to college we sat nxt to each other and we watched a movie on her phone, and afterwards she asked me for my facebook, and added me. Then later that night we were talking and she asked if I would like to go to the cinema with her... and obviously I said yes.
And making things just perfect we then got our new class groups and were together! So when we go back on tuesday we are going to be in the same group!
Now I havnt really had any previous girlfriends or experience with female friends, so I need a little bit of help.. how do I show I like ... 'like' her without been just plain creepy?! PLZ help!
Like I think she likes me as it is, but I wanna show I sorta fancy her lol, because I do, but without it seeming just creepy.

Many thnx.