If you really like the housemate, move out, then date her.
If you don't want to move out or you can't, then do not date her, kiss her or have sex with her.
On her end, the fact that you are only 1 month out of an abusive relationship is great reason to stay away from you. You are rebounding. You may think you are not but you haven't stood on your own two feet, sorted out the mess you just left or figured out who you are as a single adult. Until you do that work on yourself you are not a good prospect for a partner.