I think it all depends on the type of girl you have. MOST girls, especially around my age (18-25) are fucking stupid and can't handle the fact that a guy is totally into them. Maybe they are scared of committment... and most guys are too. I'm 50/50....I won't seriously commit unless the girl chases me for awhile... my gf now had to chase me for a month or 2, which allows me to know she is serious about me - because unlike many girls in my past experience (and things I've witnessed) I have no problem completely committing and not feeling like "I have her by the 'balls'" because she came clean first.
Basically what I'm saying is that I think most girls get bored if you stop the chase (these also tend to the attractive girls) - but the ones you should hold on to would never do that..... so maybe you should be happy if something happened with your gf because now u know she's not the material you are looking for..... that's a suggestion to cope with it even though it may seem harsh right now.