How do I become really good friends with this guy?

Nitalicious
so I have this friend who I started to like but I want to get to know him more. I call him best friend sometimes(even though were not) but haven't in a long time. we do talk and stuff in person but never about anything deep. how do I get closer to him and talk about stuff other than school and sports and stuff? how do I become like actual best friends with him because I'm bad at becoming best friends with guys? I'm usually more of "i know your schedule and where you are 24/7 because you tell me " friends instead of the deep talk friend to guys.
How do I become really good friends with this guy?
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