You are in the relationship you once wished for, but you still feel this emptiness and feel like your partner is to blame. If they did x, then you would feel loved and enough.
You blame them and they trigger you. But are you expecting the love and care from them that you are not even giving to yourself?
Are you filling up your own love so that their love is just a bonus? Are you even noticing the ways they show you love? It may be different to your love language. Maybe things are not right, but are you working on repairing the issues rather than blaming or ignoring them?
Our first relationships (with our parents or childhood caregivers) teach us about attachment. If your relationship with your parents was sometimes really loving but other times they were cold and distant, you didn’t grow up with love being available and consistent. Which is why relationships can make you feel anxious and you can over-give and feel lonely in a relationship.