What are some good ways to flirt without being too obvious? I already talk to my crush, but what type of things could I say?

Do more compliments less flirt.

Makes it obvious, loud and proud of it. If you can't flirt someone bravely in their face without being obvious then let go of them.

And try to let go of crush, whether you like someone or don't ? Love someone or don't ? If you like them then praise and compliment them fearless. If you can't be obvious then let her go.if you're not sure how you feel then surely let go of her/him.