Should I stay or leave?

My daughter/I moved in w/ my guy his daughter lives w/her mom whos a slacker & he overcompensates to make her feel loved. No prob. Among the things hes done is covered the apt in pics/paintings/other sentiments of hers & theres no space to add my touch/fam pics; that wasnt my complaint. My prob is that in the living rm he has 3 large portraits of his daughter (1 pic, 2 paintings). I feel this is our fam rm & the focal pt of our place & the walls shouldnt be covered w/ these portraits but some nice art that we choose together etc. I suggested a compromise to put the 3 on a wall in our place that already holds a big painting of hers& make it "her wall" but he wants them in the liv rm b/c she feels special that way We have 2 BRs the 2nd he has her stuff on the walls & wont take it down to accomodate the kid who lives there(mine) my kids awards/clock/pics line the floor against the wall I cant decor the room he says she needs this to feel loved. she needs parenting. I pay rent/buy food