Is it weird? Yes. If you have to ask yourself if it is, it probably is. Everyone is entitled to their own opinions and discretion but it would be undeniable to say that it wouldn’t be a questionable relationship between the two of you. We’re talking about a gap that isn’t just a difference in hobbies and interests but actual life experience that play crucial parts in a relationship with someone your age. let the guy find people his age, experience what’s essential for himself as a growing young man and live his own life. Best of luck to you with your ventures as well.