Confused

I’ve been together w my partner for 9 years but he has Facebook w all he’s family and friends and recently found out he has Snapchat and he’s family also how would you feel if he’s family never had you on Facebook and Snapchat but still talk to you and mother in law says I’m her favorite daughter in law but doesn’t have me on face or snap she only has her other daughter in law I feel like it’s all been a lie