Complex sentence: He came close to marrying several times but had no enduring romantic relationships, and wrote in his diaries of Zed, a young boy: I have fallen in love with Zed (...) the whole situation is an impossible one.
Split into simpler sentences: He came close to marrying several times but had no enduring romantic relationships. In his diaries of Zed, a young boy, he wrote: I have fallen in love with Zed (...) the whole situation is an impossible one.