Does my girlfriend still like me?

so we have been dating for about three months now and we all see eachother sometimes we go to an iceskating rink sometimes we go to movies but now she wont even answere my text or phone calls i left her a voice mail if she wanted to go the movies but she never answered before we would talk on the phone all day or text and now she wont even talk to me (this has been going on for about a week or so) so does she still like me!!....is this a sing of cheating please help!! thanks for the answeres