One of the girls I had an intrest is moving... then another one has a boyfriend, and I later realized it wouldn't work (she's a big jerk) so I just lost intrest in her. Now there's someone else... but how do I start talking to her and whatnot? She's kind of quiet.
I've never had this problem in the past talking to girls, even if I have a crush on them.
Just talk to her. Don't waste a minute of your life. Either talk to her or move on to someone who motivates you to talk to her. Don't overthink the first conversation. Just be like Shatner and "don't care". You'll be tgabbing away with her in no time