I liked my former deskmate very much, but now I'm ignored. What should I do?

Friends should tolerate each other, your Leo is stronger and Aries is more stubborn. There is nothing wrong with quarreling. It is normal. The problem is that one side has to lower its posture in order to make up, but both sides refuse to lower their posture and can only become more and more stiff. I think you are living a tight life, which proves that you still have a good impression on each other, that is, your emotional foundation is good. As long as you are willing to lower your profile and take the initiative to communicate with him, I think you will become good friends again.