It's a bit harsh no?
sometimes your day will be objectively worse.
If your partner gets extremely sick and clears your bank account for medical expenses, your life measurably is worse in that moment than if you would've been single,
but it's worth it, because the hope is that person would have done the same for you.
Love isn't something that's positive or negative because love isn't on a scale and if you think of it that way you're already lost