Don't do this to your self , just because you can't find that one person who would love you for who you are doesn't mean you won't ever find him in your life so don't loose hope.
Well to cheer you up a little, i have never bin loved by any women that i loved and i am 31 years of age, my hair is starting to fall already, and i ran through many deppresion episodes still do everyday.
But i still beleave that i will find that person , my belief is there. even if i am 40 years old when i do find that person i will do my best to be a better person so that when it is time, i am ready for that person to embrace her and give her and my family the best "me" i can possibly have. and i am trying to be patient. patience is important very much , you can't find the right person if you worry too much or think you are useless just believe that the person you are looking for is out there right now and he is looking for you too , when you do find him you will wish you found each other long long ago and you will live a happy life , just believe in yourself you can do it , and concentrate on making yourself better because that will only increase your chances of success.
When you think about love try to think using your mind not just your heart , when you are looking for that person, meet his parents if you can because you can tell a lot about a person from his family and his friends. and take your time.
To be or not to Be