Whenever we meet a new person there is an energetic exchange of data that occurs through the chakra system. We remember all the previous connections and unresolved lifetimes. I would add that usually by the time that we actually meet a person we have already been connecting with them energetically on the astral. Although many types of relationships are pre-ordained in this way, such as friendships and business partnerships, for a moment I'll focus on romantic possibility relationships.
If you review what you were thinking about during the past few months, or check back into your dream journal, there may be hints and indications of the new relationship to come. You might have been wondering if you should move, and thinking about a location that turns out to be where your new love interest lives. You might have been considering in your mind some life situations you could live with, and spontaneously have a random thought like, 'I guess I could handle taking on step-kids'. Perhaps you woke up one morning with the thought to learn how to play golf and ultimately find out it's the new friend's favorite sport.
Through the ongoing psychic connection with all of our soul mate family, we learn and grow and connect together. The calming truth about this is that there is perfection in the way our lives unfold and there is an ongoing communication with everyone, even those we haven't met yet. Relationship is not about chance, or forcing ourselves to go to clubs or do online dating. We can do these things if we feel intuitively drawn to them or we enjoy them for their own sake, yet we will only meet a love interest if that is how we've already decided to meet them in our telepathic conversations. This is an elegant system where the right person shows up at the right time because we've already been planning for it for months (or lifetimes!) and we are truly ready.