I'm Straight I have friends but things are starting to get weird?

It's a girl thing, I think. Women, gorgeous as they are, can get really possessive and controlling (men can too, I've just had more experience with it in girls). They're trying to manipulate you a bit and you should sit them down and tell them nicely but firmly that you love them to bits, you'll always be there for them, but they cannot tell you who to see etc. If they give a damn, they should respect the fact that they are smothering you a bit.