I was texting the guy I've been seeing yesterday, and as we haven't gotten to talk lately, I asked if he would want to/could talk (on the phone) that night. He replied with "sure that'd be great :)" So, later that night, I called and he ignored my call! A bit later I texted him with "busy?" and got no response. It's almost 3 PM and he still hasn't texted me. He really has seem interested, especially over the past week. Should I be worried?