Is it normal to get nervous around other dudes in the gym?

Pretty straightforward: I’m freshly 18, I’ve never identified as gay or anything of the sort, but lately I’ve found myself getting pretty nervous around other more “attractive” guys at my gym. I’m definitely jealous of their bodies, but I can’t tell if I want to be them of if I want to be with them. Do I need to be doing some soul searching, or is this a normal insecure-guy thing and I’m reading too much into it? I figure this community is a decent place to ask