First off, believing in socionics does not matter if it is true (obviously) and in fact, probably disrupts the natural relationship process. Instead putting all this emotional energy into something that is a lot of work to learn and is only possible if you're willing to be impartial and logical, why not just look for someone who has the supposed benefits of duality within your own social circle?
1. You are comfortable living with their lifestyle
2. They are good at opposite things and you naturally want to do different kinds of work
3. You do not feel stressed after spending a lot of time together
4. You feel like you can argue and be critical without being personally hurt
5. You are suggestible to their ideas
6. Your relationship is not monotonous
ect. this is just a quick list but I could make you a better one if you like.