How do I hint that I like him?

My friend is leaving tomorrow, and I really really like him. My friend says it obvious I’m flirting with him so I don’t know if he’s aware of it.

I’m just extremely upset tonight that I fancy him and never told him and he’s moving across the country tomorrow. I’m gonna be so lonely without him but I don’t want to ruin a friendship telling him I like him.

He clearly isn’t attracted to me if he’s never made a move right???