What’s the worst that could come out of hurting someone? They would never talk to you? They would never do anything for you later? They would never think of you in the same way again? No, that is not certainly it.
The worst thing would be when you get hurt yourself too. At times, even more than you actually hurt the other person. And then, you can’t forgive yourself for it.
That’s the case when you hurt someone you love.
So spare yourself.