Love by the Mile

This man has only ever used sex as a weapon. Should I be worried that doesn't scare me away?
Sal DeLuca is only in town because of his cousin. He's broody and hot and I think he could be good for a summer fling but he doesn't do those.
OK. Fine.
And then I find out why.
Sal and his cousin have a messy family situation going on. All I know is that it led to them taking over their parents' huge company. A company that wanted to destroy my best friend's family. All this leads to darker secrets and the reason why Sal is so cold to me.

In working through that, we become closer until the day he makes me keep a promise I made early on.
If he needs me to walk away, I will. Now he needs it and I don't want to.
Love by the Mile is a billionaire, enemies to lovers romance with a happily ever after. It includes lots of steam, a rich hero who tries to hard to be a jerk, yet hates himself for pushing away the only good thing in his life.