Actually I think this is how it goes when people get out of their teens. Personality will matter more. I think OP should wait with his interest in girls until he finds one worth trying and at his age they're one in a million or so and definitely not the one this topic is about.
Me and fat? Let me laugh please. I made a belf because it's one that resembles me most closely of all chars, so talk to the hand.
And yeah I know it's not required to have low IQ to hit the gym sometimes but someone yet has to prove me that gym regulars can be smart and not have bad attitudes. You already failed at this task though.
Also, why the heck would anyone teach a teen to hate his body because some teenage chick and her dumb friends *supposedly* don't like him because of that? Just let him be and in time he'll find the right girl.