why im always depressed about not getting relationship ='[?

look im 17 and I never had a relationship and I recently I found out ever single one of my mates has had a relationship and now I just feel left out I want to love some one but I dont understand why I cant get one I know love comes at any time of your life but why is it taking so long for ME to get my first relationship. to be honest I feel like I cant wait any longer and this is really making me depressed but I feel like im ready I took loads of relationship tests and passed ALL of them and my personality its id say good enough to get a girl but its just not happening what have my mates got that I havnt got I just feel like a failure =’[ and really I know this is wrong but I feel like its my condition thats puting me down because what it is, is ADHD which seems to make me quite hyper than usual but my so called “mates” have been saying to others how “retarded” I am and now I have been called several times “retarded” and “freak” and that has also made me depressed I tried every angle to cheer my self up but nothings worked and I feel like the girls at my school are seeing me as a “retard” or a “freak” all because my “mates” are saying that I am like they are going for the croud instead of what im actualy like on the inside I feel like there judgeing me on what I do just please please help me why people are doing this to me =’[ I feel like a relationship will make me happy cus it looks it I just want someone to love me for who I am not some kind of “freak” =’[ I cant take it no more