Aquarius can be really hard to pin down relationship wise, because alone, by default, Aquarius prefers groups and platonic relationships/friendships, and aren't into romance.So, we'd need to depend on other aspects in the chart to tell us a little more about how this person would behave in love.
Mars in Scorpio is a pretty sexy place. This person is probably very magnetic, even without even trying. You might just be attracted to this person for this reason, (like anyone else within a 10 mile radius)
His moon in Pisces would make him very sensitive, compassionate and increase his humanitarian side, mixed with Aquarius, it's like a double whammy of altruism. This will make him very romantic and dreamy on the inside.
Venus in Capricorn usually doesn't do well romantically. Their love life is a mess more often than not. I don't believe anything is written in stone, and I'm sure V in cap can overcome their difficulties in relationships and that there are plenty of people out there with their Venus in Capricorn who have very a very harmonious lovelife. They're also not known for liking PDAs or even showing much of their true feelings. Perpetual romantic poker face. And they won't like to mix their professional life with their romantic life, or home life, so you'd have to find this person in a place where they're comfortable opening up to you. Time and place is crucial.
His Venus indicates he'd be attracted to someone serious, hard working, disciplined.
Your mars in Capricorn could compliment his Venus in Capricorn.