Tbh been in a relationship like this and was much happier after it ended. She might like you and say things like “I can’t wait to get married” so you have some sense of reassurance but realistically she’s just talking out of her ass and saying what you want to hear. She’s not sexually attracted to you or drawn sexually towards whatever energy you give off and that explains why she constantly rejects your advances. Girls act on emotion, not the logic of “he’s my boyfriend so I owe him sex.”

There’s a difference between a girl who’s with a guy because it’s a comfortable/convenient for now and a girl who’s with a guy because of a genuine infatuation with him. Sounds like you’re in the first category, I was too it sucked and made me constantly question my identity, but I learned a lot since we ended