DD's first birthday

[*LittleMissSummer*]

I'm already starting to make plans for DD's first birthday and i'm feeling really stuck about who to invite.

I only want close friends and family, those who she knows really well. I have a lot of friends who are already asking about her birthday and i feel like i will be rude if i say i'm sorry but you aren't invited..

I'm having it at my house and because my loungeroom, well my whole house isn't that big so i can't fit alot of people. And yes there is outside but her birthday is in winter and no doubt will be freezing.

I've decided that SIL won't be invited, but am really sad that her kids will have to miss out on DD's special day but thats something ill have to deal with.

I've invited one of DP's cousins and she is coming, he seems to think that his mum wont come when she finds out that this cousin is coming (she is from his dads side)

It would be just so much easier if everybody could just put their differences aside and be there for DD but thats asking for too much apparently..

How do i approach everybody with my decisions?? - how do i let down some of my friends and how do i tell MIL that this cousin is coming but i still would like her to come?