Complex sentence: Star-Lord (Peter Quill) is trying to avoid the Slaughter Lords and bounty hunters who are pursuing him, since Mister Knife put a bounty on his head, and also trying to maintain his long-distance relationship with Kitty Pryde.
Split into simpler sentences: Star-Lord (Peter Quill) is trying to avoid the Slaughter Lords and bounty hunters who are pursuing him. Since Mister Knife put a bounty on his head and also trying to maintain his long-distance relationship with Kitty Pryde.