SA by partner

I won’t let myself admit it was sexual assault even though I know it was. My partner and I have been together for 5 months. From the beginning, I told them my biggest, most important sexual boundary is asking me verbally for consent before touching my genitals. They had been following that until they didn’t. We were laying down watching a movie together. We weren’t even doing anything sexual at all. They just started touching and squeezing my chest then they started touching my genitals. All without asking. I went into freeze. I couldn’t say anything. I just laid there. I know that impact> intent. They said they fucked up, that they’re human. Gross. It’s even more messed up because a week before this happened we both opened up to each other about past sexual abuse that has happened to each of us. I’m very confused. I want to blame myself. I want out of this relationship. It’s all just really hard right now