BUT WHAT IF I GET REJECTED.
That's really every nervous boy's fear when it comes to telling a girl "I like you". Plus, didn't you say that you like her? Just because she might 'reject' you doesn't mean that she's gonna hate you, it just means that you're not really the person she is looking for.
Take what other people said and do it, and you may have a shot. Who knows, you might actually be successful for once getting a girl friend. Just don't have the same luck I have with ladies. Otherwise, you're probably gonna end up in a deep hole with no exit.