I want to initiate a conversation with a guy from my class?

I am at the university. I matched with a guy on tinder in September, but we never talked. However, he is in the same circle of friends as my roommates, so he is not completely random. Last week I found out that he is the president of the society I just got accepted to. We never run into each other, except for the society meeting that we had last week. How can i initiate a conversation? Can I text him to ask something about the society?

I want to initiate a conversation with a guy from my class?
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