HELP ME REMEMBER!!!

I'm trying to remember the name of a book I read a long time ago and can't remember much about it other than it being one I enjoyed alot. I'll give what details I do remember and any help would be super appreciated. I think I remember something about Scotland in it. A young guy was the main character but he had a big (I think the book said gargantuan) man with only 1 eye that fought at his side. The main character wielded a sword or possessed a special sword...something. The big man with only one eye also had an 'unspoken love interest' with another character in the book. Sorry my memory/details are sketchy but any info would be awesome. I also remember something about a Raven. I dunno. Thanks!