Confused about how girl is acting

okay, first off we're both in our 20's. about a week ago we started talking on facebook all day everyday and as things went on she said she really likes me, cares a lot about me etc. said I was such a sweet guy and it was extremely refreshing cause all the other guys just wanted sex from her. the first time we talked on the phone was for about 4 hours and went really well. then the other day and we hung out for the first time and we're both shy so at first we were warming up to each other then eventually was kissing, flirting, etc. took like 10 minutes just to say goodbye to each other cause she had to go to work and didnt want to. NOW here's what truly baffles me.

oh I forgot to mention she was feeling sick, anyways. so she goes to work and before she'd text me every now and then when she could. but this time it was far and few between and when I said I had fun today she didnt really say anything back. so I just bide my time until I know shes home from work and such, ask how shes feeling and she said worse, just wants to go to bed etc. so I was like okay ill let you get some rest, sweet dreams etc lol like how we have been saying goodnight and shes just like "thanks. you too. night" then today I waited to see if she texted me like she usually does but didnt, so I asked if she was feeling any better and no reply until she went to work like "hey sorry I just got to work its been a crazy day" said shes still been sick and had to help her mom. understandable right? well I told her I wasnt feeling sick at all so im probably in the clear and shes like "i think I might have strep, really thinking you shouldnt have came over..." so I told her well I had a lot of fun and I dont regret it, I hope it didnt make it awkward between us(only said that cause of the weird vibes) and I know youve been busy and sick. and shes like "yeah I have" then I asked her so is everything still good or are you not sure? no reply. so later on I get on facebook and I see shes on chat and I wait.

then I say hey and she takes awhile then is like "hey I was just about to take a shower lol" im like "i keep catching you at the worst times lol" shes like "i know im sorry :(" then I said id be on when shed get back. so she gets off of fb chat then I notice she's actively commenting on other peoples status' and playing games, so im like hmmmm is she avoiding me? she never did get back on chat, and no text either. so my question is, how can we go from being near inseperable for a whole week to this with no logical reason?

"Such a sweet guy," is a phrase some women use for a person they like but don't feel attracted to. There are many possibilities for what's going on with her but the bottom line is something has changed that she doesn't seem to want to discuss with you. It very well may be something that doesn't involve you at all. My advice is to back off completely. Either dump her or tell her to contact you when she can and then completely leave her alone until you hear from her. If you hear from her, maybe you can get an explaination. If you don't, there's no better time to learn this isn't working than right now.

The object isn't to be "sweet," it's to be someone who is in command of his life. If you have time to text her all day sounds to me like you need to find something more productive to do.