You can't really force people to understand or even to accept your passion for Twilight - you can decide to let their opinion matter for you and do a difference to your way of handeling it, or you can decide just to enjoy your Twilight thoughts and experiences alone or try to find others with same passion.
When all this is said, I think it differ a lot what people find crazy or 'too much' into it. I mean, personally I love Twilight. I play the game on my phone daily, watch at least one of the movies every week, most weeks all of them, and read in my books almost every day. I've even been dreaming about Twilight - and thinking Twilight thoughts and reffering to Twilight quotes and scenes in real life, but none of the people around me is even half as interested in the Twilight universe as I am. They don't even know the names of the characters - but I've accepted that they don't bother that much and then I decided to look around at the internet and found this site. I've been lurking around some time before I decided to make a profile in here and now I just enjoy the universe with you in here and enjoy my real life when my pc is off. Like that I don't get too crazy in the universe as well. :)