Complex sentence: He is one of Merry's lovers, and she truly loves him, he shows jealousy with some of the men when it comes to Merry, and showing such jealousy is said to be a very un-sidhe thing to do.
Split into simpler sentences: He is one of Merry's lovers, and she truly loves him. Similarly, he shows jealousy with some of the men when it comes to Merry, and showing such jealousy is said to be a very un-sidhe thing to do.