It's a hard one your young and you are probable just scared that you won't find any of the HOT bomb shells that are on t.v you want wild sex
But hey after 3 years things change and it should get to the nice stage. Not the damn she is fat I want to leave.
If you don't want to have sex with her because you are not attracted to her anymore then well my friend you have to leave her.
Because your just waisting her time and yours.