We argue for silly things, would you conside this flirting? How to move on to actual conversations?

Anonymous
Me and my crush argue ALL the time for silly things. He really likes to tease me. Everytime it's for pretty silly stuff, I start telling him off for something stupid he did or said and he starts asking "huh? huh?" or saying "shhh shhh shh be quiet, will ya? shh" (he knows it gets on ny nerves because his voice is naturally loud while mine is naturally soft so he ends up talking over me). Other times he starts making fun of me while I'm talking which also leads to arguing. We usually end up laughing a lot while at it. Actually, we always have fun when we're together, when we talk he often says stupid stuff (purposefully perhaps) and we laugh our asses off. That's, like, 50% of why I like him. None of our classmates said anything so far, but our teachers often say "should I get the two of you a room?" and "just date already".

Would you consider this to be flirting or are we just both very stubborn people? Also, there's this problem which is I can never have a serious conversation with him though I want to. How do I do that?
We argue for silly things, would you conside this flirting? How to move on to actual conversations?
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