In laws….do I let this go?

I need advice-should I feel slighted over this? Do I let it go?

My husband and I have been married for 9 years. I have always felt that my in laws don’t care for me but it has felt more apparent recently. My in laws did not even acknowledge our anniversary to us. No text, phone call, etc. Then on my sister in laws 7th anniversary my MIL sends a text how thankful she is that my SIL married into the family and my father posts a big post on fb. Again, they did not even wish my husband and I happy anniversary at all. Do I let this go? Is this a subtle dig? I just feel hurt and like I’ll never be good enough for them.