my ds who is SEN was always left out (literally whole class invited and him and another child with SEN were never invited) he was invited to close close friends parties but that was it
i was really upset over it once, after yet another missed party, so another mum at the school who i was friends with asked the mum (she's a gobby moo and was upset my ds was missed again) and the response was 'well we didn't think they'd behave, you know, with their issues' and 'issues' was said with a whisper......my ds is dyslexic
she was acting like he had a serious illness or something. que more probing from my friend where she literally had this mum backed into a corner and it all came out that several of the mums had come together and decided not to invite my DS and the other child with SEN, needless to say she got a mouthful and got told to tell the other mums the same.
call it spiteful but DS next birthday he was interested in having a party, so i went all out.....all 31 kids + siblings, massive hall, massive bouncy castle, massive bouncy slide, sumo suits, ordered dominoes pizza and ice cream from them(thanks to a 50% off voucher and a friends staff discount) made my own candy bar, did huge ott party bags and had dress up characters, and provided an aray of drinks and food for the adults and purposely made a point of greeting said evil mums at the door and pointing out that i know they didn't invite my son to their party but DS wanted them there.
i was very smug when they were still talking about the party months later, all kids including the other child with SEN, we set aside a quite area if he needed it i spoke to him mum about his needs and anything that might make it more enjoyable for him (he is severely autistic, mum confideded in me that that was the first party he had been invited to and she was really emotional that he was socialising and didn't need the quiet room) had an absolute ball. this lead to both my DS and the other child being invited to every party til the end of primrsry school
anyway......8 years down the line....DS is doing amazing at school and is best friends with evil mum 1s son.
but point of this long post is, it didn't effect my DS and he knows what happened as i explained to him when he was a bit older, he's of the opinion that it's was the mums opinion of him not the child's opinion, but she seems to have no problem with him now and actively invites him round etc
but man, i was gutted, i still get sad now to know he missed out of those experiences, children are fickle, i know its hard i've been there, she'll forget about it but you will still stew (or you could throw a party and not invite certain kids) ;) what ever floats your boat 