I have school. Also, Jack is sixteen. A fourteen-year-old having a crush on Jack wouldn't be ideal, honestly. I can see a fifteen-year-old and sixteen-year-old getting together, but not fourteen.
Jack isn't currently looking for a relationship or hoping someone will find him or anything; he's on the major KokoSylvie ship (Sylvie can be Sylvia's nickname sometimes, and it just sounds cute being KokoSylvie). Lucy will only be available to date when she gets into the school as a student in about a year, and only by students in her own year because she will technically be thirteen by then.