For me, loving someone is a conscious decision to dedicate myself to an individual regardless of what happens (the exceptions are deal breakers).
I do this by assessing how similar our values are, how we handle conflict and resolved problems, how our interests overlap or if there is mutual interest in trying the other person's hobbies (EG I have never cosplayed, but was always intrigued. One partner loved it, so I jumped on to try), along with similarities in conversation style. I also examine differences, and see if they are complimentary or could cause minor problems (minor problems being defined as not being deal breakers or be the major hifhlight of the relationship).
I also asses whether they have the three most important qualities I look for (for me, those are kindness, quirkiness/silliness and intelligence). Your three most important qualities you look for may vary from mine.
I need to know the person for at least 6 months to make sure there is consistent data.
After that, I start the dating process. After about a month or so, I ask about their relationship needs (I would say there are six main ones: intellectual, emotional, sexual, recreational, practical, and spiritual). After an additional month, I decide whether or not I love them.
It is different for everyone. It depends on your definition of love and what you have determined to be your process. You could decide what your most important qualities are in a partner, and what your relationship needs are, if that may help give you insight.