I feel ya man... I have some of those same fears.. but hey be glad that at least you TRIED with those girls. It's much better than being the guy who posts "I never asked them out and now I wish I had.. I wonder what would have happened... did I miss out an opportunity on 'the one'?"'

You found out those girls aren't for you. And if it was that easy to find true love, then it wouldn't be worth much would it? So just try to keep your head up... yeah it sucks being lonely, but what else can we do but make the best of it? Focus on other areas of your life and keep yourself open to any and all opportunities to meet someone.