There won't be any reasoning with this person, because he already feels strongly that he is a wonderful person, his ex-girlfriend is a terrible person, and while she doesn't really deserve him he wants her back - or is just upset at the injustice. I don't really think there's much we can help with here.
Question, when you say watching, are you talking like setting up hidden cameras, watching through windows, and following her everywhere just to make sure she's not cheating? Because if that's what you are talking about, then we are not only talking about a stalker but also a control freak who could become a potential abuser, as these are signs. And yes, not only would I drop this so called nice guy, (whose not a nice guy, by the way), but also slap a restraining order on him so fast, he wouldn't see what hit him.
I've had a few friends who have been stalked. And one who nearly lost her sister because the stalker confused her with her sister. All because of jealousy.
I've had a few friends who have been stalked. And one who nearly lost her sister because the stalker confused her with her sister. All because of jealousy.
Okay, I think my joke fell flat,
But you know I'm a silly brat,
At least that's what AlaynaJ said,
I'm sure she wants me dead.