No shaming, fair question.

From a societal ethics standpoint I don't see a reason why any decision in this would be reprehensible. Both seem like valid lines of thinking to me.

If your social support is stable enough even without your partner, I think that's doable and might be fine.

Now I'm also considering whether you are able to take care of an aging partner as well as a younger child or teenager which might be another thing worth considering.

I think I personally would lean towards keeping the child but mind you I'm a 30 yo guy with no partner, so I have a very different perspective on this.

Anyway I hope whatever decision you make, you will make it work.