Hey there EmGem!When it comes to what a person needs or is looking for in a relationship, we look to that person's Moon & Venus signs and the aspects they make to other planets and also the houses each placement is sitting in.
Based on your friends chart, I would assume that he would want someone who will allow him to have freedom (Venus in Sagittarius - 11th house - unaspected). Venus is what we look for in a partner and how we express our love for our mates.
It's also evident that he may require space in relationships based on his Aquarius Moon, Aquarius moons tend to have emotions but don't show them and they aren't the type that will prefer mushy-love if that makes since. They will want to be with you, but will also want time with their friends and family. But his Moon is also making a hard aspect to Pluto, so his emotions are probably intense.
I'm not sure how accurate your friend's birth time is, but it looks like if he would have been born a few minutes earlier, his descendant would be in Cancer. Our descendant shows what type of partners we attract and having your descendant in Cancer would bring on emotional and clingy mates.
Have a great day