Search Results: no response to phone calls

Summary:
-Started talking to a girl off a dating site. she's 18 and in highschool and i just turned 21
-We've been talking for about a month and a half. a month into talking (we've been texting and talking all day, most days) we finally met up and we had a blast. she even mentioned stuff we could do together in the future and etcetc, and we made out a lot and at the end of the night i told her i really liked her and she said the same

- After our first date (described above), she's been talking a lot less. at first she told me she's been really REALLY sick, which i believe because i called her one day and she sounded terrible, but now she claims she's been super busy.

Me? I've had enough girls who aren't clear on whats going on. i up front asked her "Ok so be honest with me, i promise i won't get mad, are you actually busy? or just not interested?" and she said "no i swear i really am just busy"

i said ok, gave her the benefit of the doubt and believed her... but her barely talking is still going on. I have to sometimes double or triple text just to get a response, and i know she sees em (shes active on tumblr, which she uses her phone for) but she doesn't seem to respond right away.

during this "slow talking" phase I've asked her to hang out and i've flirted with her and she'll flirt back and say "i'd love to" to hanging out, but she still is acting very distant which im totally baffled about.

what also really bothers me, me and her briefly chatted last night and i texted her back TWO MINS after her response and said "hey are we still on for tomorrow?" and i didn't hear back from her. i then texted her in the morning and still haven't heard anything back. she's done this before, but i asked and she said she's still interested, but im confused.

also i asked her what she thinks about being exclusive, she said "i dont know honestly. im very cautious because I've had my heart broken alot. and i swear im not lieing" and i said ok and to let her think.