Make certain movements to check if he is imitating you. When people listen intently to others, they subconsciously imitate their body language. Next time you have a conversation with someone you're interested in, do certain things. For example, you could fold your arms, place a hand under your chin, or lean forward.

Pay attention to what he wants to know from you - If a guy asks you a lot of questions about your personal life, it shows that he doesn't just want to chat. Then he wants to get to know you on a deeper level. This could indicate that he considers you a close friend, but also that he is interested in more.