My (20F) boyfriend (23M) moved in about 3 months ago and we are in a long term (almost 18 months) relationship. At first it was really great because he met all the standards and everything was going good ,but I found old messages on his phone from a month before we started dating. (They grew up together, are basically siblings but grew apart, and the girl (20) is getting married and was pregnant at the time when I found these messages) The messages were of him asking her for nudes and afterwards saying "breasts" are different when it's your sister's. I have struggled with intimacy due to incest and this was really hard for me to take. I only found out things he's done as an, I suppose "former playboy" when we moved in. There has been a lot of distance between us since then because I can't see him in the same light. He smothers me with love more as if he's trying to make things better. I have borderline personality disorder so it is hard for me to discern if something is going on or if my mind is playing with me. I don't have money for my self as I have to support us both and I don't get much as a student. I can't go out with friends and I struggle even buying shampoo and conditioner because I can't afford anything except the bare minimum. I am the one who asked him to move in, in the first place, basically begged. There has been other circumstances but this stands out the most. How do I approach this? AITAH for not wanting to live with him anymore?