Is it wrong, by default? Of course not. You’re a kid from my perspective, but so is he… objectively, you’re both adults. With that said, it could definitely go wrong, if you’re not careful… the pitfalls are many. You’re at different stages of life, his personal development —while not as frenetic as your own— is still steaming ahead at a good clip, you probably have an at best tenuous grasp on your own desires and motivations, and so on.
And “wrong” is just one facet of the conversation. The absence of sin isn’t virtue, and the fact that nothing’s wrong doesn’t mean everything’s right.
The main thing, I think, is to be sure that you both remain constantly aware of the gap between you. And I don’t mean aware as in “ooh baby, I think about how young/old you are and it makes me hard/wet!” The gap should always be a factor when evaluating one another’s behavior. No matter what nonsense you might believe about your relative maturity, you are mostly going to act like a nineteen year old moron… you’re going to make lots of mistakes, and he needs to be patient, thoughtful, and considerate of your growth process. Which, to be honest, isn’t easy for a thirty year old to do.
So be careful, and don’t rush. The main advantage of being young is an abundance of time.