We take the concept of “other half” or “soul mate” too serious; things are not that easy. Even if you and your partner have an amazing relationship and similar points of view it doesn’t mean that you should see eye to eye on everything or react in a similar manner. Don’t be angry just because she/he doesn’t react like you expect them to.
You have to understand that you are not dating yourself and that everyone is different. You are not your own partner!