Her current boyfriend Brian Packham, played by Peter Gunn, will soon be leaving Weatherfield.
Details of Brian's exit are still to be revealed but Julie will be left heartbroken as the romance comes to an end.
Cavanagh told Digital Spy: "She's going to be devastated and moan for England.
"However, with Julie being Julie, she will bounce back.
"She's a bit of a survivor and as long as she has her family around her and she doesn't get too lonely, I think she'll try and find herself a new man."
Viewers will see the couple start to drift apart as Brian tries to tell Julie that he does not want to foster children. Brian is then offered a job in Wales but doesn't tell Julie about it.
Cavanagh explained: "It's actually Todd who finally lets slip about the job.
"He randomly comes up to her in the street when she's getting her Christmas cards and tells her.
"I think the fact that she doesn't find out by Brian makes it even worse for Julie to grasp.
"I think she would like to forgive him, but this is a huge thing for Julie. She won't see it as just a little white lie because this affects her whole life.
"This might be the wake-up call that shows her that things aren't working and they both want different things.
"They both really love each other but I'm not sure if they can make a compromise. Julie wants children but Brian doesn't and Julie is going to have to realise that Brian's not going to shift."