The new guy im dating has a friend who is crazy?

So this guy and I are just getting out of the getting to know you stage into the next. His friend met my friend and they hit it off went on a couple of dates and he just went crazy calling her all the time at work and at the cles she teaches. The first time she doesn't respond right away she receives a long questioning letter made up of demands that she call him back and why is she ignoring him. So my friend is going crazy trying to avoid him and is really nice about not wanting me to jeopardize my budding relationship with this guys friend. But since this psycho guy is at my guys house practically 24/7 its hard to stay out of the subject especially since he tries to pump me for information. I tell him I don't know but he keeps asking. So do I talk to my new guy about this or what.