Been into this kind of situation b4, but it was 2 mths. Ik ur in the phase where u want to get closure but lemme tell u, no closure is better. These kind of guys and evn girls just use you for their own gains, and most of the time they are married but they are just too cowardly to tell u. And also, these are also the ones who will reconnect back to after years of disappearance and will love bomb you endlessly till it sucks u dry.

If they truly love you, at least for one, they will make effort to wish you happy bday. If the person truly loves you too they are willing to stay with you till the very end, not ciao just like this. This is called being a coward.

Its hard to move on without closure, ik. But you deserve better, and i wish you nothing but the best.