I've been wondering if my efforts matter

I've been texting my daughter for days, then months then weeks for a total of 4 YEARS. For most of that time I only get a message from her on Mother's Day, Christmas, sometimes on our birthdays. But I've texted ALOT and since she almost never replies, I wonder if it even matters. So I'm down to sending thoughts to her once a week usually on Fridays. Today I realized that since I was busy packing I hadn't sent her a weekend message yet. Again, I wondered if she was annoyed with my messages or if she at least regarded me kindly in someway. Deep down a voice inside me, you better let her know you're thinking g of her So, it was two days later than usual, but I sent her a message. And GUESS what I got?!? She answered my question , and even said "thank you for wondering, and tell grandma I miss her" I wanted to shout "yeah! She responded !!!" Her response is a very important answer for me!!!! That she answered, how she answered, what she said-- says a lot! (Her parents get copies of every text and voice message she sends and recieves...and I've always wondered how that might affect her communications) Anyhow... I've been waiting years for a reply. And I got a thank you!.