I cant face a group of peoples

The only way to really get over that hurdle is to do it, practice it. If you can't bring yourself to go where groups are you may want to try some form of therapy to talk about what's going on with you. But the cold hard truth is you have to build that muscle by working it out.

 

To add something; if you get a job where you are forced to work with customers, you automatically get used to be in contact with a lot of people. Even without noticing this, your train your social aspects!