I could tell you exactly what is going on with the current set of girls you are interacting with...they are nervous around you because they do not think they are good enough for you. Most guys on here will never have this problem or will not understand it as they are usually trying to impress the girls they are trying to chase.
If you are a really attractive guy, humble, have great character, and have yourself together financially most girls will be scared of you even though they really like you...try and figure that one out. Girls will give you those deer in the headlight eyes because attraction is not a choice (you know that look - most guys will not experience this) and if you approach them like a gentlemen they will still get nervous and sometimes walk away.
Most girls are insecure and not confident thats why they usually flake, don't respond, act distant, reject you first because they think you might reject them, etc... it does not always mean they do not like you. A guy who is on his purpose and highly attractive knows he has options with women and will not put up with the crap that most girls dish out to the guys on this forum. A guy of this caliber is like a horse with blinders, he will go straight forward and be direct and to the point with the people he wants in his life because he is too busy with his purpose to worry about why X girl does not want to go on a date with him so he will move on quick. These types of guys are not ****s or douches nor do they need to "next" a girl, they will ask a girl on the spot for a date if she passes his initial attraction level and character level, if the girl accepts great if she rejects him great as well. Most of the time he will not get rejected directly, if he does get rejected instead they may ignore the date request or just nervously walk away (yes this does happen).
Whats the purpose of this speil...if you are the guy i mentioned above you need to keep being that horse and moving forward, find an attractive and confident women that will have the confidence to date a guy like you. It is not going to be easy...trust me, but when you do find it you will know.
By the way most people will tell you to lower your standards and settle because they do not understand that this is going on in your life because they themselves have never been on this level...don't ever lower your standards or settle that's the story they themselves since they lowered their standards and settled.
Good Luck!