Sometimes one person in the partnership is the deeper one, but that grounds the other person, and the more lively one brings the deeper one out of their shell. I don't really think this is a big obstacle to your future happiness, especially since you have decided you love him. His Gemini sun and your Aquarius sun are both air signs, so you are ruled by your intellect, and both intelligent people who are interesting and have many interests. These interests don't all have to be in common; I suspect being an Aquarius you want some freedom in this relationship anyway, at least to get out with your GFs and just have some "me" time.
Your Scorpio moon means you are very passionate and caring, having intense emotions. But your Aquarius sun balances that out. His Virgo moon may make him seem less caring than you, but Virgo moon people are devoted to those they love. He worries about you, will take care of you when you don't seem well, and is practical and reliable, something both of your moon signs share. He may be flirty because of his Gemini sun, but both of you can have other planets in signs, houses, and aspects which change things. Try not to be jealous, a Scorpio trait, but one that is mitigated by your Aquarius Sun. I think you will do fine.