isolated by misaligned teeth

iam generally not an insecure person my imperfections dont usually bother me at all but there is one little flaw that almost haunts me it started off bothering me so i hid it by the way its almost impossible to hide i have missaligned teeth and i think its very unattractive even as a child i was made fun of for my teeth and the insecurity grew and grew for about four years and still is there are some times when i just think of it for hours and the reason i feel most isolated is i have never told a soul and it scares me to do so also i feel isolated because if most people have this problem they get braces problem solved well i never did and my mom told me i will someday when she gets a full time job which is not even close to possible right now and im 17 going to be 18 soon and almost done high school i will be quite old when i do get them but i just feel isolated cause ive worked it up to i cant talk about it i cant show them and if people ever ask me too smile i feel sick to my stomach and change the topic and if people ever talk about teeth i feel sick to my stomach anything related to teeth and correctional methods such as braces and today at my girlfriends house which is problably the person i fear most seeing them anyways i was in her sisters room and i saw a case and picked it up it said invisalign the clear braces then she complained she got the metal ones and her sister didnt and then i felt sick to my stomach then she said her teeth were better and asked if i liked them i froze up like a popsicle i felt like i was going to throw up then i quickly changed the topic but ever on that day i felt sick and then as i was leaving her dad almost caught me and i ran and i just feel like ive been pushed over the edge i have had a stressfull week and just feel like dying iam so stressed and so lost and feel so isolated what can i do anything?