A person who is Demisexual typically doesn’t experience sexual attraction to someone unless they have a strong bond with them first. On a similar note, a person who is Demiromantic typically won’t fall in love with a person without that same kind of strong bond. It’s on the same gradient as Asexuality.
One of the awkward things about writing is that we become acutely aware of some of the words we use, especially the ones we use most often. “Said” can make us physically cringe, even though readers often glaze over it. In the same way, saying the same character’s name over and over and over again can sometimes start to feel cluttered and over-saturated, and so we can be tempted to mix it up a bit.
Maybe if the protagonist’s first name is worn out, you’re tempting to switch to his whole name, or his surname. Maybe a nickname, or an identifier like “the bespectacled man”.