Do you need to confess for him to know that you like him? If so, you should flirt with him first. It shouldn't come as a bomb to him, specially if he is your friend. Man are easy to trigger. Invite him for a movie, a night out, a drink... make him understand that you like him, without saying. Tease him. Before you know, he might be the one to confess. In the meantime, you had a great flirt time with him, where you build an amazing chemistry for the relation you want to build. Go get him girl.
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