BF and I were talking about this the other night. I do not feel a part of his Mom's family, but he didn't realise that before. I don't feel disliked or shunned by them or anything, but just not part of the family. I feel like BF's SIL didn't become part of the family until she married into it, even though she'd been dating BF's brother for several years. There's just a slightly weird dynamic I guess, which I'm not a fan of but I feel it could be tough to change.
I do feel a part of BF's Dad's family though. We get along great, and I feel like they're genuinely interested in me and what I'm doing as an individual (not just as BF's GF). I enjoy spending time with them, and I always get a hug when I leave. Interestingly enough, BF's Mom never got along with them.
So, how about you - do you feel like a part of the family? If you're married, do you feel like you became more a part of the family after you got married?
Life is good today.