What are some signs he likes you?

Anyone know what signs guys give off when they like a girl? I suck at reading them...

I’ve caught him staring at me and we’ll keep staring at each other for a little bit then both look away.

He finally came up and spoke to me for a bit after only saying hi to me when he saw me.

Sometimes he seems a little nervous.

Or maybe I’m just reading into it too much and overthinking as always...