Benefits and new partner??

I currently live on my own with my 3year old daughter. I had to give up work due to my daughters health.

I am in reciept of all benefits at the moment. I struggle to get by each month even though I get help towards my rent. I am thinking about asking a new partner to move in but unsure of how this will affect my benefits. He works and receives 180 per week.

Any advice would be great?