The past few weeks something strange has been happening to me. Ive lost interest in most girls except one. Ive been in a LTR for about 4 years and ive almost totally lost interest in sex. The other thing is ive stopped smoking - i wanna quit drinking as much I go to the gym and enjoy boxing / thai boxing. When im out i still talk to girls but not really that interested if they like me or not. The thing is im only 21 and I used to smoke / drink as much as i could / smoke weed etc. I have no idea how this has happened to me.