What’s wrong with me

I like a guy... by like I mean love. He’s flirting with another girl. They’re not dating? so technically he’s still in the market. He is a family friend so I’m scared of making a move. I can’t bring myself to talk to him but I need to. I need to tell him. But I’m afraid😱 I wish I could tell him, or even have a small conversation with him. But when I’m with him all words leave my vocabulary. I really like him. I’ve cried so many nights because of how I feel but I can’t do this anymore I’m so hurt