"How do I approach making a Junior more than a friend when I'm a sophomore?"

I can understand how being a sophomore and wanting to make your junior "friend" more than a friend would be intimidating, but honestly one year is not much difference. Chances are the fear you have of the person being older doesn't phase them at all. In fact, I bet they'll be impressed that you took the initiative even though you are younger.

So try to overcome the fact that they're a little bit older but at the end of the day, you're pretty much the same age, so don't stress over the age factor too much.

Also remember that confidence is attractive in a person, so if they feel like you're confident they'll feel better about the situation. But don't be too confident, that's just being cocky haha.

I'm sure you'll do great!