We've had my DP's 3 1/2 y/o son here for nearly 3 months now. I love him to bits. His mum has mental health issues and has a violent man around her, shes not seeing him often at all and her family have advised us to think about only allowing her supervised visits. She maybe talks to him a couple of times a week. I do everything that a mum would do with him (asides active stuff as I have a disability, but DP takes on all that stuff and more), but I'm aware i'll never actually be his mum. I find it really tough, especially when my partner overrules how I feel on certain topics (like him being brought up with some influence of my beliefs, going to a religious school just because its good, having him looked at ASAP by a SENCO person because we have worries about him having ADHD/ADD etc), because I'm not his biological mum. I've been in his life for more than half of it, and we were talking about that to do if anything happened to my DP and he said that DSS's mum would kick up a S**T storm if he made arrangements for me to have custody in event of his death - frankly I don't care because she's not safe for him to be around, she gave him up willingly because she knew she couldn't cope and provide what he needs.
What can I do about how i feel and all the rest of it?