Advice?

So I’ve been best friends with this guy for a year but I’ve known him for 2 years. Anyways we talk about everything he knows everything about me. We used to hang out allll the time, then I moved to a different state. We talk all the time we do the normal good morning goodnight and love u texts but he’s started calling me babe and baby. I call him babe back but idk if he likes me or we are just really good friends. I think I like him but I don’t want to lose my best friend. Drop what you think below please:)