A.W.
Reading this I felt like I was reading about my own life! The only difference is that while my family likes my husband they don't really seem to care whether either of us is in the family. I helped my sister pick her wedding venue, reception venue, wedding dress, and flowers and fully thought I would be her maid of honor and then she had my mother tell me I wasn't in the wedding at all so she could have room for one of my sister's fellow teachers and a student. I was so hurt and embarrassed I didn't even go to the wedding. So I know how you feel.
I also feel like my family shoves me off to the side and they tend to do the same to my kid. I always do whatever my mom asks me to do for her or my siblings and suck it up and still attend the family gatherings so it doesn't cause waves (even though I spend the whole time sitting in a corner with my husband because every time either of us talks to anyone it's either ignored or we're talked over). It hurts me the way they are towards me but I just try to not think about it. I try to limit contact with them to a minimum- we only go to the major family functions, I don't try to contact my siblings outside those events, I just focus on my family- my husband, kids, and our friends- and remind myself they love me and value me. I try to surround myself and my kid with people who really do care about us and show us so she doesn't feel deprived. Maybe you could focus on that to help you with that crappy feeling that you get from your family.
Good luck to you. Hugs, I feel your pain so know you're not alone