Charlotte Swan/Season 1 Romance

Charlie appears to be single in the beginning of "Magic Isn't Real", which would make sense due to her leaving and not being able to keep up a long distance relationship, something she revealed she couldn't do in a future episode. She doesn't have a boyfriend nor does she have any notable signs of crushing on any body in the M.T.J.C., although Drew Osbourne may have a crush on her.

Drew Osbourne
The Drew-Charlie romantic relationship is referred to as Darlie and his highly shipped. Drew appears to have a crush on Charlie early on in the first season and actually admits that he does, the first truly noteable hints given out in "The Magical Teenagers' Justice Centre (M.T.J.C.)", when he tells Tyler Goodman about his crush.