Probably not. First, take a good long look at yourself in a mirror. Make sure that you are clean and neat. Next, find some outside activities to get involved with that you enjoy. Look at the things that you really like doing, like painting or helping other people. Find a club or organization that interests you and join. Maybe take some night classes in a subject that you always wanted to learn about. The main thing is to stay busy with things that you really like to do and don't worry about asking girls out. If you are happy with what you are doing, it will change your whole outlook and make you more appealing. When the right girl comes along, you will know it.
Don't let the previous rejections get you down. Be good to yourself and always remember that the best of them have failed and been rejected at times, but looked at it as learning experiences and kept trying.