I never want to go out anymore?

I avoid talking to everyone on facebook, skype and on iphone, i instantly logg off if anyone who might talk to me is online. I have to force myself to pick up my phone just to check messages, as if i'm scared. I don't know why i do this, if i get caught in a conversation with someone who's my friend i make up an excuse on why i have to go. Its not that i don't want to talk to my friends, i want to - want to talk them but i don't. Its my mind saying no no no no no no don't pick up the phone, don't leave the house, your going to be miserable. When i ask my mum to go out somewhere that i really want to go i hear my mind saying no no no no no please say no please say no. Its like a bad feeling thinking about all of sociallzing and i want it to be a good feeling.
what's wrong with me?

You could be experiencing social anxiety. Some people take medications to help them relax. I suggest talking to your mom about it and maybe see a mental health physician just to talk and explain how you're feeling. They may be able to help.

It sounds a lot like social anxiety

Social anxiety is a feeling of uneasiness, dread, or apprehension about social interaction and presentation. Frequently, the primary concern fueling social anxiety is a concern that one will be (or is being) judged negatively by other people, regardless of whether this is actually the case. The experience of occasional, mild social anxiety is quite common, as is the experience of anxiety in general. Social anxiety can range from a relatively benign, infrequent level of severity to being a major hindrance in everyday life.

You should tell your mum and go visit your doctor, they can really help. You'll probably be offered therapy to start with and if it isn't better by the time you're 18 they'll likely put you onto some kind of medication.

I suffered with Social Anxiety Disorder since I was a kid and now I'm almost anxiety free, so you don't need to panic about being this way forever because 80% of anxiety cases can be improved a lot by therapy.

You could have social anxiety.

I have same problem. Some time my mind want to talk but my not take any interest. I know I'm a shy boy and less talkative person this making of a coward boy. I know i have social anxiety disorder. You have also the anxiety. But there's a cause for this behaviour. I'm surviving with some problem that since childhood therefore i have social anxiety disorder.