What can i do about her?

in my 2nd period cl theres this girl named sabrina i like alot and ive never even talked to her 1 on 1 wev'e said stuff ping like i was wearing a flannel and she said thats my favorite color!! haha so what can i do to get closer to her talk to her and eventually ask her out? like i said ive never even really talked to her so i cant walk over sit down and start a convo