Why does this keep happening?

About 5 or 6 months ago i met this girl and we started talking. I had planed on going on a date but she wasn't ready for a relationship at the time because she had just gotten over a long relationship so understandingly I kind of gave up on the relationship altogether because she really didn't seem all to interested. Then a couple weeks ago she emailed me and we started talking again. She wanted to get together and hang out so we set a date and kept talking. We seemed to have quite a bit in common and called/texted about every day. We went out and had a couple of drinks and things seemed to go pretty well, other than the expected initial awkwardness. but i felt pretty good about it. I have tried to contact her the past couple days just to let her know i had a good time and wanted to set up another date. But she is completely ignoring me. This has honestly happened with the last 4 girls over about a 3 year span, i dont date very often.

I dated another girl for about 4 dates and we were really hitting things off and enjoyed each others company. Then one day her best friend texted me saying i should stop contacting her because she was suddenly uninterested. Wtf, this has seriously happened with the last 4 or so girls i've actually put an effort into starting a relationship with. Every girl has come onto me, its not like i push them into a date or anything. I could go on with more stories but they are all the same. Girl comes onto me, we get to know each other, then all of a sudden they pretty much disappear. They often try to 'get back in touch' a few months later, but i'm over them. Its really getting old and it's kind of getting to the point were its hard to trust and get emotionally attached. Like i said, i dont date often and this kind of makes me lose interest in dating altogether.

You don't say how old you are but I get the impression that you're young.

What are your expectations when you go into these relationships? Are you expecting the real deal,a steady, exclusive relationship that's serious? Are their expectations different?

Since this has happened with multiple women over a few years, it's probably female mind games. I can't say for certain that this why they're doing this without context however. Maybe they're not really interested in you and see you as a sort of backup plan if there's no guy better at the moment.

I honestly don't know what these women are trying to accomplish by doing this, if these are female mind games, but maybe it would help to read up on typical female dating patterns to get an idea of what and why they're doing this.