You were a normal spider person, however you'd never had a good relationship with your parents.

They never really cared for you, and you never really cared for them either. However, you always saw Peter as a father figure in a way.

Given that your parents never really cared to celebrate your birthday, neither did you.

But Peter sure did, which was clear when you came home to see Peter, in your universe, in your apartment, with a cake a little hand made decorations.

"Happy birthday!"