Lady Gaga and Taylor Kinney's breakup certainly shocked fans in July, and an insider tells Life & Style that the singer had a tough time moving on in the weeks after.

"Gaga would constantly call Taylor on the set of Chicago Fire, and even made friends with crew members so she could basically spy on him," the source reveals. "He got fed up."

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But the Grammy winner is prepared to make a change for the actor. “Gaga told Taylor that she knows that she has trust issues and she admits she needs to give him his space,” the source says. “She told Taylor that she’s making sure she’s 100 percent ready to be in a mature, loving relationship without the jealousy and control issues."

Which is great news for Taylor. "He has missed Gaga terribly," the insider adds. "He wants to make things work. They both feel like their love is worth it."

For a look back at the couple's cutest photos, scroll through the gallery below!