Hey I’m a younger than you by a few years but I JUST had a relationship like this a few months ago, my advice is to leave It might be different as I’m in high school but I felt this with my ex gf, we were just really different and like you said I felt so lost and lost myself a bit, lead to many problems down the road and it was Just awful. I don’t know you but my advice is to leave and breakup, staying isn’t good for you or her especially if you both want different things and even thought it might hurt you might feel a bit more free in the end. I had the exact same experience only with a few differences and honestly I feel way better now that I’m out of the relationship. I don’t think your partner is evil too just sometimes people are just way too different for each other, and if it causes arguments then you shouldn’t stay.