Brian Lee, who co-wrote this song, is also known for working on such hits as "Good Time" by Owl City and Carly Rae Jepsen and "Work from Home"by Fifth Harmony.
EliteDaily.com wrote, "'Don't Know What To Do' is a ballad all about breaking up with someone you love and not knowing what to do with yourself without them. The lyrics in the first verse really drive that message home." And more, "...the song goes into the feelings one goes through when they desperately want to reach out to their ex even though they know they shouldn't."
