Phone boyfriend

A boy with whom you share a close emotional bond; communication is largely limited to over the phone. You text all the time but for some reason can’t or don’t meet up. May or may not ever become your real boyfriend.

From Schitt’$ Creek episode 5x05 (Housewarming)

(At Patrick’s housewarming party)
David (to Stevie; indignantly): Where’s your phone boyfriend?
Stevie (Exasperated): He’s...on my phone?