I have worked with men and women who are very much attracted to each other but in the end they end up not being able to see each other for weeks or even months because they are trying to make themselves “be missed”.
Mind games mess with someone’s head and heart. Today they say they love you and tomorrow they are not sure. This is because they truly don’t know how they feel about you.
If you want someone who is sure about how they feel about you, let them know you are available to talk to them and to spend time with them, but don’t plan your whole life around their schedule, and don’t continue texting someone long after they stopped responding.