I think i have inferiority complex, how do i get rid of it? i dont know where to start?

i think i've been having inferiority complex all my life.i've always felt different than everybody else. especially people from the same age group as me(since i was little).i rmmber how i always know the right things to say to ppl even if i don't mean it and its against my beliefs.i rmmber how disgusted i felt about myself for being such a hypocrite.i don't know why i did datat! but dat was back in highschool.it had cost me friendships(i dont know why, up till now, i'm scared to get close to anyone). i always have a hard time expressing myself. its getting really frustrating.i remember how i wanted to do lots and lots of things, but when i get to do it, i change my mind out of fear. i dont know what i'm scared of. i'm just scared.i nvr thought i had a problem. maybe i knew but i just didnt want to admit it. i dont know. but what has got me thinking is now that i'm turning 20,the same problems still arises. mostly out of fear of i'm not sure what.now i feel a lotta guilt n emptiness