Mother’s Day

So I️ need some opinions here please. I️ am 26 years old and lost my mom when I️ was 8. Mother’s Day has always been tough for me. I️ am the oldest of 3 and took I­t­ the hardest I️ think. My boyfriend and I️ have been together for about 5 years but a few months back his mom started to not like me saying i was lazy and disrespectful. I️m in school and nanny to make money but was living with them until I️ wasn’t allowed to stay there anymore. So Mother’s Day is this weekend and she only wants to spend Mother’s Day with him and he isn’t talking to her or convincing her to let me join when they both know I️ don’t have a mom. I️m literally so hurt. I️ keep bringing it up to him but he continues so say she doesn’t know what she wants to do but I️m like I­t­ doesn’t matter I️ should still be included. What do I️ do???