Steve, I've been where you are now. He came back, but didn't want what I did. I tried to wait it out. The second breakup was worse than the first. Thirty years later, it still aches.
Break it off. Now. Delete his AIM contact, lose his digits, forget his FB account. You've told him how you feel about him; he's told you he doesn't feel the same. If something has changed for him, and he wants you as a boyfriend, it's up to him to say it. Clearly. No hints, or songs with hidden meanings. If you can, tell him what's going on - that you won't be happy being his friend, you want to be more, and he should only contact you if he wants to get back together.
You're too invested to be able to just be a friend. Come on, you're stalking him. Unless he wants you, you're holding on to false hope, and that's not healthy.
Unrequited love's a bitch. Somewhere out there is a really cute guy who will love you as much as you love him, and that's who you deserve.
And Mike's right. Your English is beautiful.
Good hunting.