well sometimes we just have to go through the bad apples to reach the best one 🙂, over a period of time when things don't change, the brain or heart or may be both start finding fault in ourselves to make us believe this is the reason for rejections. It's a bummer to go through all this but do keep trying, take a break from dating to refresh on something else personal to you, while you are back into dating just don't have sex until you are ready for exclusivity. Even then its not a guarantee that things will work out, relationships just fall apart for n number of reasons, so why beat yourself over it...let it go!