I'm quite shy and lacking self esteem but when it comes to girls I like, I can't talk to them as I get freaked out and scared that I will be rejected. Why can't I be more confident when it comes to talking to girls?
I think that happens to everyone. Like from my experience when I "try" to talk to a girl I tend to stutter, or loose eye contact, but I got better over time. My advice will be just go with the flow, and just try to make conversation, and if there is any pause ask her a question, and just talk from there.
dude,, just forget about how much you like them,, and just talk to them. hell practice talking to chicks by talking to any attractive chick you meet like (subway chick,,walmart cashier) whatever. you'll be alright