Girl I Like Advice... HElp..?

There's a girl that i really like. Really. I've been talking to her for about three weeks now. She's intelligent, funny, and beautiful. I not sure how she feels about me. I think she likes me does because of the following hint. We text almost everyday. She acts shy when I come around and she took my readers home and took a picture with it and sent it to my phone.She laughs at my cute but corny jokes. But i haven't had a chance to really spent 1 on 1 time with her because she's always with her friends. Anyways the reason im here is that, just these couple of days, she and her ex boyfriend that she hasn't talked to in 1 year have been walking around campus these last two days. I dont know why they broke up because i've never asked her. But anyways, I'm wondering if i should tell her how i feel or let her figure it out for herself and take a back seat.. Thank you all for your advice.