Ok let me help you here…to seclude yourself is losing battle! Believe me, it will be 10x harder for you once you start shutting everyone else out! The biggest thing you could to is ask for help! So many people don’t and that’s a mistake right there. That is 100% anxiety you suffer from and it needs to be dealt with. There is lots of good books on anxiety and coping skills. It’s ok not to be liked by everyone, in fact you are searching for non-existing thing if that’s what you expect. Nobody is perfect and guess what…many people that have smile on their face are simply good at hiding their worries and unhappiness. Nobody said you need 347 friends in life. I’m in my late 30s and I can count my friends on one hand!