Jessica Simpson is not sugarcoating her heartbreak.Simpson, 45, opened up about her unexpected split from Eric Johnson after 10 years of marriage.Although the "Irresistible" singer revealed that the separation wasnt something she saw coming, Simpson didnt shy away from acknowledging that both she and Johnson made missteps in their relationship.JESSICA SIMPSON FINDS FREEDOM IN NASHVILLE AFTER FLEEING HOLLYWOOD PRESSURES"I choose love because if I chose to be resentful or if I chose to let the pain of it overwhelm me, I would fail," she told Parade.She added, "And so I had to choose love and loving people through their mistakes. If Im going to love through my mistakes, I have to love others through their mistakes. And that really was probably the biggest lesson of all."LIKE WHAT YOURE READING? CLICK HERE FOR MORE ENTERTAINMENT NEWSWhile Simpson looks ahead and puts the past behind her, she's also returning to music following a 15-year hiatus. In March, she released an EP called "Nashville Canyon, Part 1," and in September, she's set to release the follow-up, "Nashville Canyon, Part 2.""When I was in Nashville and recording, I was going through a really hard time, an unexpected change of life," Simpson reflected. "I dont think Ive ever been so confused. But I didnt let the confusion, theheartbreak, the negativity of that hold me back."JESSICA SIMPSON SLIPS INTO SHEER DRESS FOR 45TH BIRTHDAY CELEBRATIONSimpson emphasized her determination to remain strong not just for herself, but for her kids and even Johnson.The "Take My Breath Away" singer explained that she needed "to get to a place where I can have grace and compassion for the situation for the sake of my kids and be strong for myself, for my kids, for my family, even for Eric. I am a leader."Simpson shares three children with Johnson daughters Maxwell and Birdie and son Ace.As she goes through a transitional chapter in her life, Simpson said shes looking on the brighter side of things."It is so important to brightside the s---out of things. Im a very optimistic person, and I know everything happens for a reason, and I know the truth sets you free."CLICK HERE TO SIGN UP FOR THE ENTERTAINMENT NEWSLETTERReps for Simpson did not immediately respond to Fox News Digitals request for comment.In January, Simpson shared that the couple "have beenliving separately" but did not reveal any details on the timeline of their split."Eric and I have been living separately, navigating a painful situation in our marriage," Simpson previously said in a statement toPeople."Our children come first, and we are focusing on what is best for them. We are grateful for all of the love and support that has been coming our way and appreciate privacy right now as we work through this as a family."