IPhone 4s suddenly deleted all my contacts for no reason?

I was just using my phone as normal, when I suddenly couldn't access texts anymore. The app would attempt to load and then just crash. So I shut down the phone and turned it back on. I could now access my texts, but I noticed immediately that all my contacts were gone, since all my texts now had numbers instead of their names. I checked my contacts in the phone section… Completely blank.

What the hell happened and how can I get them back!

How to stop her doing this again? - 1

My girlfriend recently dumped me because of a series of flirtatious text messages with a girl I had a tiny bit of history with.we've been talking for about a week now after I moved out and things seem better between us, all the bad blood seems to be gone and what I feared the most seems like it will pass. I feared that if we ever got back together that it wouldn't be the same. We both have exams at uni so we decided to wait until uni is over to get back together officially. Just the other day my ex said for the first time in weeks she doesn't feel any anger towards me, she actually misses me and wants to see me and thinks we can make things work.
The problem is the girl who I had the flirtatious text messages has an alcohol problem. Its only coming to my attention now. We're friends and because of what we did it's damaged our friendship because she does like me but knows she can't have me. She was just enjoying her and I flirting because she would soon leave the country and wasn't sure if she'd ever come back. I said that we can't talk even as friends as much as we did before because i'm trying to fix my relationship and its my priority. As a result she took it the wrong way and said she doesn't want to talk to me because it hurts too much. But every now and again she gets drunk and sends me drunken text messages. Now i've told my Girlfriend that I'm not talking to her which i'm not but i'm worried as to what i should do, I can't block her on my iphone. And if my girlfriend sees the text messages that she sends me sometimes she won't be happy. But this time i'm not actually doing anything. I know it's my fault but I want nothing more than for my relationship to work. What do I do, Grinding it out isn't gonna help and talking to her isn't either because I think she's an alcoholic. What do I do?

Added (1). I don't think all three of us talking in person is going to help in all honesty

Are there any apps for the iPhone that are actually good?

They market the iPhone as having billions of apps but they neglect to tell you they all suck.

Are there are games I won't get bored off after I beat in 5 minutes? It's amazing I go back and look at all the apps I've downloaded, over 100, compared to how many are on my phone, 2.

Cut the rope
Angry birds
Anything with friends

Amazing how such dreadfully boring games are amazingly popular. Advertising bots give your game a 5 star rating while advertising for another game and that tricks people into thinking your game is actually fun

How to keep the same mobile number on a different sim?

I've had the same number for years and just bought a iPhone and its got a different number to it obviously, I want to be able to keep my old number and just transfer it into my new phone? Do I just have to phone my network or can I email them instead?

Law enforcement help? Which law is broken?

I was in the school library and left my phone there around 9:42. Before 10:30 I realized i dint have my phone and I left it in the library. The iPhone was taken by another person. They are in possession of an item that is not there's.

The supposed story of what happened… I left my phone in library. A student found it and told the teacher. They figured out it belonged to me. The teacher told the same student who found it to return it to me. He was bringing it to me when another student stole it from him. I, he, the teacher, and police officer know who this thief is. I have been trying to get the phone back as it is valuable and expensive another one.

Added (1). I don't know how the other student took the phone that's what I'm currently trying to figure out

What happens when you block a number on an iphone?

I had a number blocked online on my Verizon account. My dad said that it says on the website all calls and texts are blocked. So what happens when this person I blocked trys to text or call me? What does it say for an iphone?

How to turn off my 4G Internet on my iPhone 4s?

You can turn off wi-fi on the iPhone 4s. Is there anyway you are able to turn off 4G internet? I keep going over my data network, and I don't want any temptations. I want all internet off, so I will not be able to go on at all. Please note, I don't want to eliminate my 4G network, I just want to be able to turn it off for a bit occasionally, when I go over my data network.