Self weening baby

Grace

My baby is just shy of 7 months, he is breastfed/formula plus has purees, lately he is not satisfied with the breast, constantly pulling away then wanting more then pulling away again, he doesn't get full and I have to give him a bottle. Sometimes he won't even take the breast. I know babies self ween but I'm not sure how to go about it and I'm sad because I'm not ready to stop breast feeding.