Should I express how I'm feeling or not?

So there's this guy, I really like him, but he's kinda acting hot and cold with me, sometimes he's flirtatious and caring.. that I think yeah he likes me, and some other times he ignores me, or he kinda tries to hurt me, he takes too long to answer me sometimes a whole day and such things...
He's not shy not whatsoever, he effortlessly talks to girls.., he's smart, and cute πŸ₯ΊπŸ’•.
Please tell me what to do!!!
Should I express how I'm feeling or not?
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