HELP please crushing problems?

[juliosanchez581]

so basically my crush that goes to school with me isn't talking to me anymore we use to text all the time and have somewhat of limited conversation in person i've went to school with her for about 3 years but i didn't start getting to know her until this summer that just passed i got her # through facebook and then the conversations between me and her use to go on for hours, recently like 3 weeks ago i texted her and no response i did this for 3 weekends in a row and yet no response,at the beginning of the school year i found out i have one class with her (P.E) and i see her everyday and the problem is just bothering me i feel like something that i did bothered her and that's why she's not texting back but idk i didn't do anything to her i'm a nice guy honestly,, and i havent't told her yet that i like her and i'm just not talking to her i'm ignoring the problem even though it really bothers me i'm acting really layed back about it and when i see her she seems all happy like if not talking to me didn't affect her at all or it didn't bother her.. but is pretending to act layed back about it the best thing to do or should i confront it?