Is it normal to fail so many times

So I'm not a shy guy I can get numbers from girls but for some reason I just can't seem to get a relationship out of a single girl so I sit here today still single and I'm 24! Now I can admit I can be needy which Is a downside but I've gotten it under control and I think the only reason I'm that way is because I'm afraid of nothing happening between me and the girl I'm talking too. Maybe I'm just dating totally wrong but something is wrong I'm sure of it cuz not to be conceited but I am not bad looking by ant means and I have an outgoing personality. Is it normal what am I doing wrong when I first meet a girl and hang out with her do I not talk to her hardly at all by phone