I can kind of relate - I often dream about my last ex. In these dreams, I’m usually looking for him and feel sad that I cannot find him. In reality, I didn’t love him, was very confused/anxious all the time and glad I ended it! I’m also very happy being single; I’d never go back to him especially, so I have zero clue what this is all about.
I have read the “logic centre” in the brain turns off during sleep, at least during the REM phases, which explains why dreams don’t make sense, although when it comes to recurring dreams I’m in the “there’s a message there, find out what your mind is trying to tell you” camp. But I don’t think the message here actually is as simple as “find a partner.”