If you didn't talk to them, how are you so sure they don't like you.
Look, it is NEVER too late to change. Start talking to them now, and what is the worst they can happen?
The worst case scenario is before. (And hey, it's not even all that bad.)
Girl: Hey, you used to be so quiet before..
Guy: Well hey, you did yourself!
Girl: Did not!
Guy: Or maybe you were just too shy to talk to me. It's okay, happens to some girls... it's okay to admit you were too shy to talk to me.

Girl: I was not shy!
Guy: Okay okay, whatever you say. Hey, want to go to the movies this weekend?
If she asks why you used to be shy before, change the topic.. or tell her that she never knew you because she never actually talked to you. Views can ALWAYS be changed. I remember there was this one girl who used to think I was a "player" and she didn't like me for some personal reasons. After one month, SHE asked me out. Yes, she asked me out. Can you believe it? Women are weird, their views always change.. go figure.
Be confident, ****y, funny, and you will be fine with the those ladies. Let us know how it goes; good luck!