J,
Wow, go slow. Please don't post him links. He probably has no idea of how you feel and your threads might frighten and overwhelm him.
The greatest thing here is that you seem to want this obsession to end. That's definitely a good sign.

I mean, by the sound of things, your self-esteem dips pretty low, huh? Logically you're more than good enough, with all the effort you've put into your appearance alone, you'd be a great partner for him. But he probably doesn't even realise you're into him.
People get confused when all they have to work with are 'signs' and often some people don't really even know how to interpret obvious signs.
Don't interpret his lack of notice for a fact that you're not enough for him. His mind could be anyway, at any time when you're in the vicinity.

Have you thought about dating other people? Spending time with someone else who you think is great might ease the pressure on yourself about Eric.
Maybe you need some mantras too. Put post-its on your mirror. Write things to remind yourself that you're great.
I have a post-it on my dresser that says, "Crazy you may be, but your *** is fantastic."