why are inlaws so damn mean?

Me and my bf started our own small business. For the first time in months we did very well,I got some pictures and i posted it on instagram. Everyone in his family wished him and congratulated him but nobody wished me. His mum and sister said well done to ____ nobody said anything to me.

He did do alot in the business in the cost department bcos i was unemployed but its my business and i do a hell of alot. This is really hurting me. I dont mind that they wished him but why do u think they did that?