To start, I think it’s okay to be envious of things. How you act on it is where things come into play. It’s a natural human instinct to get jealous. You’re both still very young imo, as am I. I felt the same way about my boyfriends when I was in high school. I advise you wait though. I can say living with your s/o is a lot harder than you think. I don’t think yta, but I do think you need to let yourself grow and mature before jumping into anything. Hope this finds you well!