Bf doesn't want sex

me and my bf are in a serious relationship for 1 and a half years. it's been like a dream , we are very inlove. however we never have sex anymore. I was having a bad episode of OCD in the summer and was feeling very depressed and it affected our relationship, but now he never attempts to have sex with me anymore. before he would be touching me ALL the time and always trying to do stuff, and now he doesnt even look when im getting changed. it's making me feel insecure. (i have a great body, although I do have small boobs.. small A's. so maybe he's not attracted? even though he says he loves my boobs) i feel super unsexy because of the lack of sex. everyone tells me guys think about sex 27/7 and need it. everything is awesome in our relationship now, we live together and things are great. yet the sex isn't there anymore. is this normal? also is it normal that the more sex we don't have the more i "emotionally want it, but the less i physically want it?" if that makes sense.. i dont think he's cheating either since we spend all our time together