My physical appearance is destroying my life need serous help?

Is it normal to hate yourself that much that you can't possibly go out? Because thats how i've been feeling for the past 4 years.
When I go out I feel so much worse because I feel I don't belong to walk the streets because im so fu***** disgusting.
If anyone laughs my mind tells me there laughing at how ugly I am.
I missed too much school because Just the thought of being there makes me feel sick and anxious because im just too ugly for school.
I feel so ugly when i look in the mirror i cringe and cry at how ugly i am and scream because i just want to rip all my skin off, im trapped inside this hideous person I just cant seem to get rid of.
l hate getting jealous of those pretty girls and it not freaking fair! it's worse being an ugly girl, since girls are expected to look pretty and guys can be ugly and still get girls and have a lot of friends, and that makes me so freaking angry, l see it all the time!
I can't even explain how i hate my life sooooo much.
I just want to kill myself. l have my fathers face and l hate seeing it because he left me when l was a baby, he is a bastard!
Please help! l do not know how to get over this l will have plastic surgery when l am old enough but honestly l had enough, lm done with the horrible nasty stares, cruel treatment l get and getting called ugly every freaking day, lm on the verge of dropping out. l know l could be worse off but even if you are ugly, you get treated like crap by your family, kids at school, random people, and teachers. Even my own mother called me ugly before, and those words still hurt today she does not know how much that affected me. What medication could l use to help me overcome this obession with my apperance to the point where it is destroying my life?
I Cry .every single day. No one understands or cares. I don't even feel good enough to explain my problem to people because they know deep down I have no hope in life because UGLY!!!!!!!!!!!!!!!!!!!