“1. The Russian Federation, the United Kingdom of Great Britain and Northern Ireland and the United States of America reaffirm their commitment to Ukraine, in accordance with the principles of the Final Act of the Conference on Security and Cooperation in Europe, to respect the independence and sovereignty and the existing borders of Ukraine”

I could dive deeper into the Helsinki Final Act of 1975, which is applicable here to prove you even further wrong, but instead I’ll just use the FULL wording of the first addendum, not just what you cherry picked to help your argument.

All in All we are in fact under the obligation to help Ukraine