Counseling sucks

And counseling our counselor found out something I didn't know which is that my fiance has been faithful to all his exs every signle one who cheated on him and treated him like shit but fucked me over i dont get it nd now couseling session were tryna find out why but he keeps saying he doesnt know and how much better i amm to him nd how out of league i am but he doesn't know y my counselor thinks maybe he's taking out the hurt from past relationships on me but not sure til he realizes whatever the situation it hurts to know they got him to do things i cant i feel insecure now, what do yall think