Hypothetical situation.
You have been close friends with a guy for your entire life. He almost feels like a brother to you. He is a bit on the nerdy side and is kind of emotionally immature.
The last time you saw this guy, you've noticed that a lot has changed about him. He has been working out and now has a rather buffed-up physique, he has gotten contacts and no longer wears glasses, he now dresses in more trendy clothes, and he has gotten a lot more mature. He almost seems like a completely different person now. He seems a lot less nerdy and more like the kind of guy you would like to date. Plus, you can already tell that he likes you back.
If this were to happen, would you suddenly develop feelings for this guy that weren't there before, or would it still feel to awkward?