What does it mean when a guy says you melt?

When a guy says that to you with major conviction, that's one of the ways when you know he's yours unless they say it a lot IMHO. For me it would mean that I like the person A LOT physically, mentally, emotionally, etc. If you have been in a serious relationship with him for awhile, you can expect him to pop the big question pretty soon. If you really want that to happen, then keep up what you've been doing until it does happen.

hes crazy for you. It takes a lot for a guy to say that. Its so unmanly it'll take a ton of courage, a lot of guts and a lot of love to make him say anything remotely related to that. Cause, I would never say that but probably because I have never felt that way about a girl but it takes a lot of guts to say something like that for a guy.