 Chemistry is hard, and we're not talking about the periodic table. Making friends and finding a partner is difficult and frustrating. If only we had a cheat sheet. Thanks to a group of researchers from California State University, we kinda do. In 2015, the university did a study to figure out what factors needed to be present in order to elicit chemistry between the parties. Through the experiment, they found that you need mutual honesty, mutual interest, personableness, some similarities, and a physical attraction in order to create chemistry between people. On top of that, they found that those with an agreeable or open personality experience interpersonal chemistry more often than those who don't. Unfortunately, we can't force people to like us or want to be with us, but we can keep our eyes peeled for the five signs, so finding friends and partners isn't like chemistry class.