Is this possible, because I'd like your insight?

Is it possible for an ex who felt betrayed by you (I NEVER cheated, but I did break up with him and I was his first girlfriend so it cut deep) to one day open up to you again? For the past four months after the break up I'd been begging him back via texting and email, because he wouldn't accept phone calls or in-person visits, so he finally made it clear I need to back off or he'll file a restraining order. It sounds "serious" but I know when he's bluffing, and he can't afford that nor does he know the first step to take to accomplish that. The point was received though, so I will no longer contact him...for 3 years ;) I've decided to leave him alone for 3 years. He'll be 23 and I'll be 22. Do you think he will still feel resentment towards me for breaking his heart (even though I OBVIOUSLY BEGGED FOR HIM BACK). Do you think that after 3 years he'll be numb towards me, or do you think this is enough time for the healing process? I want to make sure he feels better so that I can approach him with a fresh start. What do you think? Thank you for reading.