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Harry Styles<\/strong><\/a> can\u2019t be happier for ex-girlfriend Olivia Wilde<\/strong><\/a> now that she\u2019s finally moved on from their doomed romance with handsome athlete-turned actor Dane DiLiegro<\/strong> and a source exclusively tells Life & Style<\/em> he was being torn apart by guilt over how heartbroken she was when he made the painful choice to end their relationship.\u00a0<\/span><\/p>\n The One Direction alum, 31, and the House<\/em> actress, 41, first got to know each other after Harry replaced Shia LeBeouf<\/strong> in Olivia\u2019s movie Don\u2019t Worry, Darling<\/em>. They dated for nearly two years, surprising many fans who considered their fling pretty unusual at first. Though, according to the source, as their connection grew, the two were seriously considering spending the rest of their lives together, despite Harry ultimately pulling the plug. Their feelings for each other were strong enough to cause some serious pain as they went up in flames.\u00a0<\/span><\/p>\n \u201cHarry was gutted when he realized he wanted out of his relationship with Olivia, because he knew she would take it hard,\u201d the insider says, \u201cand in fairness, he had made a ton of promises to her.\u201d\u00a0<\/span><\/p>\n The Tron: Legacy<\/em> star was with Jason Sudeikis<\/strong> for seven years and had two kids with the Ted Lasso<\/em> star: son Otis<\/strong>, 10, and daughter Daisy Josephine<\/strong>, 8. The couple was even engaged at one point, but Olivia pulled the plug once she started getting cozy with the pop star.\u00a0<\/span><\/p>\n \u201cShe had called off her engagement for him and put her career on the line, so clearly, she believed he was in it for the long run<\/a>, too. And at first, he was even talking about marrying her,\u201d the source explains.\u00a0<\/span><\/p>\n The insider adds that, while Olivia was all in and head over heels, as evidenced by how firmly she devoted herself to the relationship, it was ultimately the British boy bander who lacked the courage of his commitment.<\/span><\/p>\n \u00a0<\/p>\n \u201cThe issue with him is he\u2019s always all in at the start, but long-term commitment just never seems to work for him, even if he thinks that\u2019s what he wants at the outset.\u201d\u00a0<\/span><\/p>\n \u201cHe always feels bad when he has to break a girl\u2019s heart<\/a>, but with Olivia he felt a hundred times worse because she\u2019d put so much on the line for him, he felt so crap letting her down,\u201d the source says. \u201cAnd then it took so long for her to let go, she was wearing his shirts in public for ages after they split up, it was rough.\u201d\u00a0<\/span><\/p>\n Despite the heartbreak, the Booksmart<\/em> director has been enjoying her time with her new beau, Dane, 36, a former pro basketball player turned actor. The Massachusetts native, who is 6-foot-8, has been mostly cast as horror movie monsters throughout his career so far \u2014 playing an imposing baddie in the Netflix Korean series Sweet Home<\/em> and then The Predator in Prey,<\/em> in addition to roles in Guardians of the Galaxy Vol. 3<\/em>, Imaginary<\/em>, Star Wars: Skeleton Crew<\/em>, V\/H\/S\/Beyond<\/em> and Werewolves<\/em> \u2014 though he has joked that he\u2019d like to \u201cplay a human\u201d someday as he expands his career.<\/span><\/p>\n The source notes that Olivia is very happy with Dane<\/a>, adding that for Harry, \u201cit\u2019s just a massive relief to see that she\u2019s finally met someone new.\u201d\u00a0<\/span><\/p>\n