Abbeycat
Werewolf
Is he often there? I think you should talk about him to your parents, even if the risk for you is that he has the typical reaction I've been so many time confronted to: making him mad because "he was just kidding and blablabla". Honestly, when there is an insistent guy and I complain to someone else, the guys goes "you overreact, don't have humour sense and I didn't do anything. I was just teasing."
Last insistant guy I knew started following me in the streets even tough I made it clear I didn't want anything to do with him. He grasped me(that's the thing not to do, I never punch unless physical contact is initiated) so I punched him, shouting "Don't touch me, don't come to me, don't come any close to me or I will seriously damage you!". Never had any problem with him anymore, he stays away.
I'm not sure your friend's dad is a perv like I've seen so many times, but you really should talk about it to someone, he sounds like a creeper at worst, like an extremely annoying person at best. In any cases, someone to avoid! (and most certainly avoid to be alone with him!)
Ugh. I'm sorry you've had to deal with a guy that was insistent and following you. It's just creepy & uncomfortable!
My dad's friend even denied that he is a perv. But that doesn't make me feel any better especially when he didn't listen. I don't understand how someone could forget that quickly. He is definitely an annoying person. He talks all the time. He was talking to me. I just wanted him to shut up.
Doppelgang
You can't be friends with someone trying to manipulate you like that, either make it clear to him yourself or confide in someone you know and can trust to help you out :)