If you are putting a lot of importance on finding a girl, that might be causing you stress and other things. Maybe take a break and work on self improvement. Being happy with yourself first and finding other things you enjoy might open more doors for you. Finding a new hobby you enjoy might lead you to a new pool of women even.
first understand why you're being rejectd, for me when i get rejected the the number one reason is that the girl is taken , but imagine if a taken girl has an interest in you ( which happens to me quite often and it lasts long enough to actually encourage me to say something to her) then i guess you've got something.