Well, from what I've read on dating and stuff, why the girls won't talk to you OP is that either
1) You were behaving like a sissy
2) You just don't understand women lingo
3) You don't do anything to try to go next level

so,

1) Don't be a sissy by being clingy, sending messages like "why won't you talk to me anymore" (I did that too and neither will they reply), and be arrogant yet funny when you talk to them (like make fun of them and stuff)
2) Understand women look at body language and eye contact to tell the "to keep" guys and the trash can. A friend of mine told me how a coworder at her work kept looking at her with goo-goo eyes when they talk which just creeped my friend out.
3) Don't just 'sit' there and wait for her to make a move, try to climb to new heights but not doing things like tell her how you feel about her. Try things like looking at her eyes when she talks to you and when she looks back at you, keep the contact then look away. And while I still need to work on this one, get more physical with her, by that I mean like stroke her hair or her back like you would do to a friend.