Imagine Dragons star Dan Reynolds and Minka Kelly were brought “a lot closer” after she shared her deepest vulnerabilities with him and vice-versa. The ‘Radioactive’ hitmaker got to know everything about his partner’s past when they were long distance, as she decided to share her memoir, ‘Tell Me Everything’, with him, which saw her open up on her painful childhood, homelessness, and abortion. Dan shared with PEOPLE: “She’s like, ‘Well, if you’re going to share your art, I can share something with you, but it’s very vulnerable for me. Do you want to do this or not?’ “She was very scared for me…