What can melt a girl's heart?

AkumaKira
I'm not looking for standards words or quotes. If I wanted I would search the internet. I'm looking for words or actions that is sure to work and melt my crush's heart. Not too much romantic like "You are the whole universe to me"... you know. She's a crush not my girlfriend so I don't want something really heavy. But something that will surely appreciate, be it words or an action.

(For example we're meeting tomorrow for running training... what can I do that time?)
What can melt a girl's heart?
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