Why can't I sync my iphone 4S to my itunes?

I recently upgraded to IOS 6.1.3. I then went to my iTunes, and it was empty! No songs, videos, nothing! It was a whole new library. I plugged my iphone in. My account name was still on my iTunes. I managed to get all my songs etc back into the library from the laptop. But I have tried syncing my iphone to it, and it comes up saying "Are you sure you want to remove existing music, movies, TV shows, books and tones from this iphone and sync with this iphones library?" I say yes, and it says my iphone is with another library. Does anybody know why this has happened? Is it because I have updated it to IOS 6.1.3? And can I solve it? Also when I tried logging on to the account today, it came up saying "We could not complete your iTunes store request. An unknown error occurred (-50)". I still have everything on my iphone, but I don't want to sync it yet, in case I lose everything. Hope someone can help.

Added (1). So do I uninstall iTunes from my laptop, and then reinstall it?

What's your favorite song/artist/album?

I'm adding music to my iPhone and I'm looking for some ideas. I like nearly all music so I'm open to all suggestions. Plus I'm interested to know what types of music other people enjoy.

Not enough storage on iphone4? Can't take pictures?

I have the iPhone 4 and I used to have 1000 pictures and I felt like it was way too much for my phone so I deleted most of them a while ago except 230, but when I go to take pictures now it says I don't have enough storage no matter how many pictures I go delete. I only have 4 or 5 apps and no music at all on my phone, and I've deleted all my messages and cleared my apps at the bottom. I feel like my phone is lowering how much storage I can have each time I delete more, what can I do? Besides get a new phone I don't have the money for it.

Where should I work during high school?

I have to decide between this adorable little frozen yogurt shop and Hollister. The frozen yogurt place has an opening and Hollister offered me a job there. I don't know which one to pick? So, if you were in my position, which would you go for. Some of my friends say Hollister cause its cool, and you get the discount, but others say its way too stuck. I really don't feel anything towards it, I just would really need a job. I'm a sixteen year old female by the way if that helps any. Sorry for the grammar and spelling mistakes (writing this on my iPhone, so you know how that is) :)

Is this sound system setup good?

I'm wanting to add a couple 10 inch subs and a new radio interface to my car. The new radio is purely to play music via Bluetooth from iPad and iPhone. I know enough about wiring and electronics to get the job done, but i want advice on the setup i'm looking at. Truth is I don't want to spend too much on this; my car is an 02 escort (worth only $3000) and this is my first time adding anything to my car.

I was thinking about putting two of these kicker subs in

http://www.amazon.com/...B0036W7OTY

along with this boss amp

http://www.amazon.com/...004S4XNEO/

and then for my radio i was looking at pretty well anything with Bluetooth to connect to my iPad and iPhone
something like this
http://www.crutchfield.com/p_070XML8150/Dual-XML8150.html

Added (1). If you have any recommendations on subs or amps, they would be appreciated.

Added (2). Also the head unit has a 3.5mm AUX jack on the front so I can use that or the Bluetooth depending on what ends up sounding best.

We could not complete your itunes store request - Apple

"The network connection could not be stablished" - "An unknown error occurred (-50)"

So I downloaded iTunes on my new desktop and plugged my iPhone, when I try to sign in to download all my apps to my computer it says the above things. I have tried all I could to go around it, I uninstalled iTunes and re-installed again. I can't really find how to report this to Apple… So this has to do.

Any help?

Is it bad that I hate the words, I love you?

I mean if there coming from my family, or my really close friends its one thing, but if they come from a guy, I get really nervous. I don't want to be in a relasionship where we say meaningless I love you's all the time. Maybe it's from previous relasionships that didn't end well were I thought we were in love.
But for example:
I've been getting really close with this boy and I already knew he really really likes me and I liked him too. The other night we were texting and he randomly said, "I love you (:"
And you know how the iPhone has that thing where you can tell when they read it? Well our phones do that so I'm assuming he realized I read the text and about ten minutes later he wrote, "as a friend. "
During those few minutes after he sent the first text I basically stared at it thinking how to respond. Do you think he just sent the second text so it wouldn't seem that awkward? He also asked me to be his girlfriend a little while after and I said yes of course. I really do like him, just i don't know that scared me.