It's so much easier to value yourself when someone else genuinely shows that they value you too. Make sure the people you love know that you value them. Make it a habit to greet them at the door when they come home, and to always tell them sweet dreams when you go to sleep. These affirmations build up an ablative layer that protects against life's daily indignities, I think.
when people find themselves in this type of situation, sometimes they lash out, or try to be controlling/manipulative when they stop getting them, instead of being self reflective and figuring out why and addressing. Sometimes there IS nothing that can do to address it - a bogus accusation from someone else, or affirmations built on some material wealth that disappeared, or whatever.
Many people believe the affirmations they see are genuine, but when tested they turn out not to be.
It’s also easy for it to be a kind of hedonic treadmill, with someone chasing ever strong and strong affirmations to make up for a pain or fear that won’t go away, and is not faced, overdoing what you are describing to the point it is hostile and toxic.
If you look in the media, these patterns are very, very visible.
And inevitably, for any number of reasons, the affirmations will stop or reduce in number or impact - even if just due to normal variation - even if 100% genuine and healthy. Kids go to college, or partners drift apart, or everyone gets so used to it they stop noticing.
Some of the discussion from others above can be helpful here, as being ok just ‘being’ is a much more stable place, and requires only that which the person themself has (somewhat) control over - themselves.