Why is My Best Freinds Girl/boy Friend, Jealous Of Our Relationship?

Ever had that one good friend of a different sex you can rely on and talk to about anything? both of you are so close and there's nothing you wont do for each other because you are friends, but some looks at it as more than that...maybe there boy friend or girl friend? They seem to be Jealous of the relationship you have...and even questions are you really just friend. Well On "The Jump Off" we bout to here from other people and hopefully share there stories and find out why.