SUBREDDIT: r/relationships
TITLE: How do I [19F] subtly let a guy [19M] know that I'm interested?
POST: I've [19/F] know this guy [19/M] for a few weeks, and I have what's possibly the biggest crush I've ever had on a person, on him. He's funny, smart, attractive, super sweet, the whole package. I really just think he's delightful and awesome, and I can't even talk about him to other people without perking up or smiling.

I've been getting frustrated because although he's extremely sweet and kind to me, he's a VERY sweet and kind person in general and seems to be like this with everyone. He's a true gentleman, a real sweetheart, and is one of those people that makes you feel special just by the way he looks at you/talks to you. Granted, I don't know him well enough to really read him super accurately, but yeah. I've been frustrated because even if he did have a slight attraction towards me, I don't feel like I'd be able to distinguish it from his normal behavior. 

It just occurred to me that the nature of our friendship has always been to be super kind/sweet/encouraging to one another, and therefore he might not ever be able to tell if I have an attraction towards him either. So, I guess my question is this: how do behave towards him in a way that won't be totally obvious and desperate, but also won't just come across as general friendliness? I don't want to perpetually be in the friendzone (I certainly don't mind being friends for a while) but I also don't want to come across too strong.

Any advice would be appreciated! I realize this is kind of a silly question but I really like him and I'm just not sure how to act.
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TL;DR: 
I [19/F] have a crush on this guy [19/M] and want to convey it in a subtle, yet effective way. Advice?