Here are three things you can do if your partner is always blaming you (or you can do if you feel yourself blaming your partner).:
1. If your partner is blaming you they are projecting their self-blame onto you. In other words they are full of guilt and low self-worth and are passing these feelings to you rather than experiencing them themselves. By understanding this you will find more compassion for them, which you will need for step 2.
2. Refuse to react to the blame and judgment - instead notice what they are blaming you for and hold up an imaginary mirror to reflect back their negative energy. Whatever they judge you for, they are judging themselves for.
3. Armed with this knowledge pour love into them, particularly in the areas of their self-judgment. If you can talk to them sensitively about this issue and see if you can help them find where these negative self-beliefs came from. Work to heal them together.