Yes, some guys might notice. If a guy is interested in you or if he's used to you always viewing his stories, he may wonder why you haven't this time. It could make him think you're not as interested in him as before.
Probably not. People usually have a lot of followers and viewers for their stories. Unless you are someone really important to him or he specifically checks who has viewed his story, it's highly unlikely he'll notice.
Most likely not. There could be hundreds or even thousands of people who view his stories, and one less viewer isn't something that would typically stand out. He'll probably be too busy creating new content or interacting with those who are more vocal about his stories.
Some guys do care. If they post something they're proud of or something they want to show off, they may expect a positive reaction. Not getting a like from you could make them a bit disappointed.