keep

I keep my promise.

私は約束を守ります

I keep my promise in any situation.

私はどんな状況でも約束を守ります

I keep the promise I made with my friend in any situation.

私はどんな状況でも友達と交わした約束を守ります

I keep the important promise I made with my friend in any situation.

私はどんな状況でも友達と交わした大切な約束を守ります

I keep the important promise I made with my friend to the end in any situation.

私はどんな状況でも友達と交わした大切な約束を最後まで守ります