How to block numbers on a iphone?

I've been having trouble with people giving my number out to people i don't like or people i don't know or want to have my number. So i don't want to go to police or report it or anything, i want no drama. I just want to know if you can block a number on a iphone and if so what apps can you use that block.
I have an iphone 3gs

I CAN't GET USED TO MY IPHONE 5 AND I MISS MY BLACKBERRY?

I'm FINDING IT IMPOSSIBLE TO TEXT ON MY IPHONE 5 AND I DON't LIKE IT. I HAVE AN O2 CONTRACT. I MISS MY BLACKBERY BOLD BECAUSE IT IS EASY TO TEXT ON AND I'm A HEAVY TEXTER. HOW CAN I HAVE IT ALL? IT SOUNDS LIKE A STUPID QUESTION BUT NEITHER PHONE GIVE ME EXACTLY WHAT I WANT. CAN A PERSON HAVE 2 PHONES WITH THE SAME NUMBER? ANY SUGGESTIONS?

Can I upgrade from iPhone 4S to iPhone 5?

I got the iPhone 4S for christmas 2011, on a 2 year contract for £25/month with EE. At the end of my contract I can get a free upgrade and I was wandering, as it will be the end of my contract around the end of this year/beginning of 2014, would I be able to upgrade to the iPhone 5?
Any websites to see what other phones I could be able to upgrade to are also what I'm searching for.

Mixed signals from crush in high school

I thought he liked me a lot till the other day I walked to school for the first time (which he always does) I thought he'd be happy but he just rolled his eyes and started picking lint from his shirt and playing angry birds on his iPhone. He looks at me all the time and walks past my sitting area at morning tea and lunch and listens in on our convo's.

He even doesn't talk to girls in front of me as he thinks I'll get jealous. He also told his friends as they nudge him whenever he walks past. I'm just wondering why when I get so close he plays with his hair or pulls out his phone and fiddles around, how do I get past his shyness to have a proper conversation with him as I like him.

Verizon's iphone 5 or factory unlocked iphone 5?

Verizon gives iphone 5 at 199$ and the factory unlocked iphone 5 costs 649 $.
the verizon's iphone is already unlocked too.
so, why should anyone by an iphone for 649$ when its available for much cheaper rate as 199$?

Must have iPhone 5 accessories?

I just got a new white iPhone 5 16GB, and I think I need some accessories. I want to have some suggestions on the best accessories that would make my iPhone 5 a great phone. 5 Stars for the most answers!