I just had my birthday and aside from my partner, SR was the only other message. It doesn't mean anything. My kids are around 20, they have busy lives, and just like I did, they forget sometimes. It's no big deal. The stuff I do for them is out of love. It is unconditional and requires no recognition.
This is an attitude that has come from sobriety of course. In the self centred world in which I used to live, I didn't do anything without some kind of reward in mind. Its called self seeking, placing expectations on how people will react to something I have done... they should be happy, grateful, pleased blah blah, and if no appreciation was forthcoming, a nice festering resentment was the result.
The road to resentment is paved with expectation, and resentment is bad news for alcoholics.