Pavlovian Conditioning for Friendships
You've likely heard of Pavlov's dog experiment, where the sound of a bell triggered the dog to salivate in anticipation of food. You can apply a similar conditioning trick in your social life. Compliment or smile at someone every time you see them, and over time, they'll start associating your presence with positive feelings.
It's a subtle way of building rapport and creating a bond without being overly direct about it. Just be genuine about it — insincerity can often be detected quickly.