My friend and his girlfriend are moving in with each other next month and they have only been seeing each other for 4 months. He says he is in love but at the age of 16 I have tried telling him that he is moving a bit too fast, but is he?

How is that possible he is a minor.

In England it is possible to move out when you are 16

Oh! Okay.

I think that is moving pretty fast. At 16 is he really ready for that? Most adults find it difficult to move in with their partner after 4 months.

Unfortunately I doubt he will listen to reason most teenagers are quite stubborn and want to do what they want to do. Honestly this whole thing will probably explode in his face. Too teenagers living together while no doubt fizzle out pretty fast. Even some adult relationships end shortly after moving in together. The romanticized ideal met with reality often causes problems. It won't be romantic when they have to clean the toliets, pay the bills and experience normal stresses.