okay, so my honest advice for this would be to drop the subtleties , and just be direct. all boys are easy at the end of the day and so as a girl trying to get a guy , unless the guy your going after is a douchebag or genuinely just doesn’t want you , then your chances of getting rejected are pretty low.

but also you never want to misread a sign and take it a wrong way and end up embarrassing yourself. so simple things like him saying hi to you or picking something up after you dropped it doesn’t mean he likes you. now if you guys talk almost everyday in person or on the phone , then its pretty safe to assume you can build something off of that. 

now as for the oblivious part, honestly thats just how most guys are some play stupid and some genuinely just are. if you feel this strongly about you guys's energy together that your willing to confess. i honestly would just recommend ..

-Pick a private spot. Avoid public pressure or audience interruptions.

- tell him you would like to talk to him about something important , and ask that he be serious 

- begin your confession , say what you mean instead of hoping he reads between the lines

- allow him to process and provide a response 

- whether the answer he gives is what you wanted or not be sure to keep your composure and walk away from the situation gracefully, and just leave it alone. dont dwell or start to stalk him and keep trying. no mean no always 💕